my friend who has the 18" bca upper is running the ar-stoner 450 bushmaster specific mags. With a velocity of 2200 FPS, the Hornady 250 Gr. Those looking for a superior 20 upper to complete their big-bore AR-15 rifle build need not look further than this .450 Bushmaster Upper from Radical Firearms. 50 products / 241models. There are several manufacturers making hog-specific ammo that really up the game. No need to hunt down any separate parts or spend any additional money. The 450 Bushmaster is able to handle huge bullets and is therefore a popular cartridge for large North American game, even including the grizzly bear. Click here for answers to Ammo Buying Frequently Asked Questions, and for more information check out our State of the Ammunition Industry page. Furthermore, this could even help you extend barrel life. Say you were handy smith with AR-pattern rifles and were converting parts and not a complete upper (unnecessarily time-consuming, but this is an illustration). Well be taking a thorough look at packages, excellent values, and real workhorses, so be sure to know what youre looking for! Free Shipping on orders $50+ Fast, Free Shipping on Orders over $50 90-Day No-Hassle Returns. Overall, the Radical Firearms .450 Bushmaster Complete Upper Receiver could just be the key accessory youre looking for to help you make the switch from your regular AR-15 calibers to a proven cartridge that will leave you with precise and tight shooting groups. If you are looking for a well-constructed upper that is assembled and ready for install, this might be what you are looking for. Rating: Special Price $599.99 $749.99. 15-inch M-LOK Hybrid rail. It is chambered in 223 Remington, 223 Wyle, 6 5 Grendel, 5.56 mm NATO, 6 8 SPC, 224 Valkyrie, 450 Bushmaster, 458 Socom, 6 5 Creedmoor, and 300 Blackout. But with such high velocity, this upper receiver delivers impeccable accuracies at close ranges of up to 200 yards. Barrel: 18 inch, 1:24 Twist - Either 416R SS or 4150 CRMOV Nitride, 11/16 x 24 threads. All you have to do is to put this on and youre all ready to go. Getting a complete .450 Bushmaster upper is certainly a fast ticket to improve your firearm to take down large game and anything that stands in its way. Additionally, youll get an HBAR-contoured barrel and a .936-inch gas block journal. The bottom line is this upper receiver can help you take down any size game in North America. Upper Builds > .450 Bushmaster Compatible; Upper Build Starter Kits > .450 Bushmaster Compatible; Quick View. Most shooters use at least one accessory that requires rails. Add to cart. Fax: +1-866-534-3097 The ATI Complete 450 Bushmaster AR-15 Upper Receiver is another such package and its offered at a great price, too. Yes, the 450 Bushmaster is a great caliber for hog hunting! You want an upper receiver that provides a variety of features including a muzzle brake in one great, well-priced package. One user said that he used this upper as an upgrade to customize his AR-15 and turn it into a beast of a hunting rifle. Your ideal upper should: You need an upper capable of handling and delivering this powerful ammunition. Akin to a 20-gauge shotgun, this barrel freely floats from the nut thanks to a tubular-aluminum forend, which itself helps improve accuracy immensely. Sunday: Closed, 40 S Main St, Tooele, UT 84074, United States, Radical Firearms 20 Complete .450 Bushmaster Upper, Radical Firearms .450 Bushmaster Upper Receivers, Patriot Arms and Supply Stripped 450/458 Anodized Upper Receiver, Support the Power Behind .450 Bushmaster Ammo, Factors to Consider when Choosing the Best .450 Bushmaster Upper, Review of the Best .450 Bushmaster Upper Receivers, 1. A trademark of the company are options, which comes through on its .450 Bushmaster uppers. Featuring Aero Precision Upper. Where you put your emphasis will matter here and it will depend on your application. In fact, youll be getting a steal of a deal compared to some of the other uppers that are considered high-end. In fact, you should look for the absolute best out there. A very all-in-one solution with lots of included extras, Includes a 15-inch M-LOK hybrid rail with four picatinny sections, Not the most affordable option for those who dont need the extra features, although its an incredible value with them, An all-in-one package solution that includes many extras, Features a 15-inch M-LOK hybrid rail including four picatinny sections, Despite using fewer materials than the 20 variation, it is for sale at the same price, Features a matte black, hard anodized finish, Excellent option for an affordable customized build, Sturdy construction from 7075 T6 aluminum forged to mil-spec standards, Ejection port cover or forward assist option available for a very low additional fee, Not acting quickly could potentially result in the dealer being out of stock due to a limited supply, Simple installation with a streamlined design, Features a 16-inch barrel with a one in 24 twist, Provides a variety of features in one great, well-priced package, Offers a matte, reflection-resistant black finish for improved stealth, Includes a 15-inch handguard with keymod attachment points so you can add accessories, Not the most complete and all-in-one package on our list, Hurls a 250-grain round downrange at a velocity of 2,200 FPS, Premier upper for .450 Bushmaster capable of taking down large game, Exceptionally low recoil for its power, comparable to a 20-gauge shotgun, Chrome-lined chamber and bore make cleaning easy and improve barrel longevity, Radical Firearms - 450 Bushmaster Upper Receivers, assortment of .450 Bushmaster barrel sizes, Best Bolt Action Rifles of 2022 Top 12 Models Reviewed, .450 Bushmaster upper complete with barrel and handguard, Large rail space to add bigger or multiple accessories, Features a 20-inch barrel for better long-range accuracy, Complete .450 upper with KeyMod handguard and full-length rail, Drop-in installation to a compatible lower receiver, Features a 16-inch barrel for a mix of range, accuracy, and handling, T-Marks not highlighted to complement aesthetics, Optional ejection port cover and forward assist, Includes the charging handle and bolt carrier group, Black nitride-treated barrel with carbine-length gas system, Engineered to mount mil-spec AR-15 lower receiver, Chrome lining on the bore and chamber to extend barrel life, Complete upper, also includes a five-round magazine. Whether you hunt or target shoot, this might be a great upper that you can put together in minutes and be able to give a whirl at the range. You get a caliber-specific feed ramp and a matte black, hard anodized finish. The complete upper also includes an ambidextrous charging handle, MLOK handguard and a "Unique" muzzle brake made in-house by Next Level. Most of the new buyers say that this was a well-assembled and very sturdy upper. You want an excellent option for an affordable customized build. For many readers, this complete upper, which has been called Thumper, needs no introduction. Top 14 450 Bushmaster Upper #1 Radical Firearms Complete Upper Assembly .450 Bushmaster #2 Failzero Fail Zero Bolt Carrier Group .450 Bushmaster AR-15 #3 Brenton USA Stalker Carbon Hunter 18-Inch .450 Bushmaster Upper Receiver #4 GLFA AR-15 Complete Upper .450 Bushmaster 18in #5 GLFA AR-15 Complete Upper .450 Bushmaster 18in NP3 .450 Bushmaster 18" 4150 CMV Manganese Phosphate 1:24T. 9AM-5PM CT Sat-Sun (Chat & Email Only). In Stock. Add to cart. SST/FT bullet in the .450 Bushmaster "Thumper" is designed for all large North American game. Intl. ATI 16 Complete 450 Bushmaster Upper The Best .450 Bushmaster Complete Upper. PRO2A LEFT HAND 9" 300 Blackout 1/7 Pistol Length NR Side Charging Melonite M-LOK AR-15 Upper with Flash Can. Photo credit: youtube.com. Rating: Special Price $639.99 $829.99. It also requires minimal gunsmithing skills, so this wont be a complicated project. You want the best .450 Bushmaster upper receiver that features a matte black, hard-anodized finish. This drop-in design can even be simply dropped onto your lower receiver. One thing we love about the upper receivers weve gathered for you is that so many of them are a complete package with lots of extras, enabling you to spend your funds on other components like spare magazines. Davidson Defense 'Bola' 16" AR-15 .450 Bushmaster Manganese Phosphate Rifle Complete Upper Build Kit. The 450 Bushmaster works with standard AR15 lowers and parts. AR-556 MPR. is less than half the size of the 450 BM's 11.48mm (0.452 in.) Youll be quite impressed with how quickly you can install this without the need for any additional parts. Your upper should adapt to you, not the other way around! They do have some issues, but for the price, it might be worth playing . He is a veteran, gun enthusiast, 3 gun competitor, and 2a advocate. Shop our selection of 450 Bushmaster AR rifles and find exactly what you need for your next hunt! Mike has a passion for innovation and education across the industry to create great content, training, and insights from the best and brightest. Its often easy to forget that a quality upper is more than just a ticket to give your firearm .450 Bushmaster capabilities. With this stripped anodized upper receiver, you get a caliber-specific feed ramp and matte black, hard-anodized finish. Elwood Shelton is an online content developer for Gun Digest. So far, hes able to land his kill shots with better accuracy and precision compared to his old upper. Choose with or without stock lower build kits. Complete Upper Halves .308/7.62mm. With fewer materials involved, we expected to see a bit of a discount. Purchasing a stripped upper receiver is an excellent option and this stripped upper is of excellent build quality at a great price but be sure to act soon. They use entirely different Ammunition, and the bullets themselves are vastly different. Let us help! Includes 4 Rd. Whether its a charging handle or just a dust cover, our list of high-quality upper receivers include plenty of extras. I started the blog to share my experience and gun-related knowledge accumulated throughout the years. For the .350 Legend, the ammo of choice is Winchester 's 150-grain Deer Season XP, with a listed muzzle velocity of 2,325 fps and a BC of .223. So, be sure that your chosen upper is able to support your hunting style and provides ample space to support your desired hunting style. The upper receiver, while mil-spec in every other sense, must have its ejection port enlarged at the front to consistently kick your spent brass. Sign up and get exclusive access to promotions, sales events, pre-order sales & more! You also get the HBAR-contoured barrel, the .936-inch gas block journal, a forward assist, a charging handle, and the bolt carrier group, as well as the dust cover. Of course, it has an enlarged ejection port, but it also includes a removable brass deflector. Add to Cart. Before doing so, read our guide to understand what makes a great upper receiver and how to pick out a winner. This straight wall ammo is legal in states that prohibit hunting with bottleneck cartridges. Anderson Manufacturing Stripped 450/458 anodized upper receiver is perfect for the user who wants to completely build their rifle in their own way. Made from high-quality aluminum, this upper is undeniably one of the toughest of its kind on the market. This makes it easier. It is engineered to easily mount on a mil-spec AR-15 lower and tosses the 250-grain Hornady SST/FT .450 Bushmaster bullet at a velocity of 2,200 FPS. AR-15 Upper Receiver Components. The set even comes with all the parts you need in order to make the whole kit and kaboodle work to your advantage. Learn more about our Return Policy. Instead, narrow down your desired qualities and find one from our list that meets your budget. If you wanted to jump from a 5.56 NATO to .300 Blackout, technically the only part that would require replacement would be the barrel. A 450 Bushmaster AR has plenty of target and tactical applications, too. : +1-847-513-6201 A solidly made forged aluminum receiver, the XL has the strength to handle the big-bore brute, as well as the design specs to ensure it runs smoothlyi.e. Brenton USA Stalker Carbon Hunter 18-Inch . Out of stock. In fact, youll be getting a steal of a deal compared to some other models that are considered high-end. Learn More. You can learn more about me here. In fact, it wins out on our list as the best .450 Bushmaster Upper with a 16 barrel, delivering a two-for-two victory to Radical Firearms. 75090 We still think all these features make for a great value and we love having a 16 option. Davidson Defense 'Bola' 16" AR-15 .450 Bushmaster Manganese Phosphate Rifle Complete Upper Build Kit. Get the latest news and reviews from Gundigest.com. Just throwing this out there, but Satern Barrels also puts out a decent stripped big-bore upper. Special Price $609.99 $799.99. When the 450BM came along, a lot of them took more interest in getting a 450 Bushmaster AR upper to turn their coyote killer into what is affectionately known as the "Thumper" for its hard-hitting heavy bullets. Select Options. Its lightweight and wont weigh you down even when its installed on a fully-loaded AR-15 rifle like yours. Once youve completed your project, youll be able to put this to use as a hunting or target shooting machine. Aside from that, they also reported a boost in accuracy and noticed their shots were consistently tighter than normal. Concerning muzzle devices, the Thumper comes with an A2 Birdcage flash hider, so if youre recoil sensitive youll need to shop for a brake or compensator. This is a fully functional rifle that will fire off some rounds to excel in many hunting situations. This is one heck of a package and about the best youll find available in the 20 length. Even outside the great north woods, the .450 Bushmaster provides an interesting addition to any gun collection. You want a .450 Bushmaster upper with an HBAR-contour barrel. However, one nitpick for this is that it has the same price as the 20 version. . We wont break things down that far in this article, however, its worth the time to cover the difference between the main components of a Bushy and run-of-the-mill 5.56. Get the 76th edition of the World's Greatest Gun Book. Given that Patriots Arms and Supply is not the worlds largest emporium, we would recommend for you to act fast if youre interested in these stripper uppers that offer excellent quality with a great price tag. However, you might just want to pass on a complete package if you dont want to pay for things you dont want. spec. When not at his press or the range he can be found chasing mule deer around the Rocky Mountains. Upper Builds > .450 Bushmaster Compatible; Upper Build Starter Kits > .450 Bushmaster Compatible; Products [23] Sort by: . Buy a I have a complete Bushmaster AR-15 upper assembly (no FFL required) in .450 Bushmaster, it's the 20 for sale by 22Customizer on GunsAmerica.com the best online marketplace for buying and selling semi auto pistols, firearms, accessories, and collectibles : 957665873 The preference of the type of receiver would boils down to customization. And if you prefer to piece together your own build, check out our lineup of 450 Bushmaster uppers and create something truly unique! Everything else about the uppers are seamless between the cartridges, which makes sense since the Blackouts parent case is the 5.56 NATO. The 450 Bushmaster was designed to use the standard M-16/AR-15 spring and buffer. LAR-BT3 .308 Uppers. In Stock. Its easy to find a premium solutionfew would tell you not to jump on a Thumperbut if that doesnt align with your needs or budget, choose a package that gives you exceptional power and options, along with value. They said that it was a great upgrade compared to their previous upper receivers that they had installed (most of them were factory defaults). On top of that, you even get an HBAR-contour barrel, a .936-inch gas block journal, and a rifle-length gas system. Colonel Jeff Cooper described a rifle he called the "Thumper" in some of his writings. 450 20-Inch Chrome Moly A4 Upper Half LAR-15M .450B.450 Bushmaster. MSRP: $260; santantactical.com, A very lightweight option, Obsidian Arms OA-15C big-bore upper is ideal for highly mobile builds, weighing only 8.8 ounces. A stripped upper receiver does not have any components being installed hence, youd need to search for necessary accessories such as the barrel, forward assist or dust cover which could be more troublesome. It might only make sense to save money and go with a package if youre liable to buy these extras elsewhere. It would be easy for us to recommend a single upper receiver that delivers the most premium features and will never let you down. LAR-BT3 .243/6.5 Uppers. The finish is a matte black hard-anodized coating that will resist scratches and corrosion. Learn more about AR's, shooting sports, hunting and a whole lot more in our How-To Guides and Articles from our own team of in-house experts! This straight wall ammo is legal in states that prohibit hunting with bottleneck cartridges. If you want a real "thumper", check out a 450 Bushmaster Upper. Black Rain Ordnance Tyrant BRO-TYRANT-450B, Semi-automatic . The Radical Firearms 450 Bushmaster Upper Receiver could be the key accessory you are looking for if you are planning on making the switch from your regular AR-15 calibers to a cartridge that is proven to leave you with precise and tight shooting groups. You want something more readily available as this may be out of stock due to a limited supply. Adam Borisenko contributed to this article. The Right Platform Ruger's AR-556 Multi-Purpose Rifle in .450 Bushmaster held some surprises. The 20 Complete .450 Bushmaster Upper is a single solution for finishing off a build or supplementing a new caliber option to a standard lower. WYSIWYG. And believe us when we tell you that its a nasty thing to deal with when you are shooting your rifle. PRO2A 7.5" 450 Bushmaster 1/24 Pistol Length Melonite M-LOK AR-15 Upper with Flash Can Kit. The gas system is rifle-length. Obviously, there are a number of pre-assembled .450 Bushmaster uppers on the market, which well look at in a second, but its more than feasible to build yours from the bottom up. If you have a lower, all you need is a .450 Bushmaster upper and youre in business. Patriot Arms and Supply Stripped 450/458 Anodized Upper Receiver -The Best .450 Bushmaster Stripped Upper, 4. The Thumper pistol chambered in .450 Bushmaster provides a punch on par with the .454 Casull with the handling, reloading speed and optics options of an AR-15 platform. It has higher supersonic velocities than most other big-bore .45 caliber AR cartridges but is not typically used as a subsonic round. Email: [email protected], 9AM-7PM CT Mon-Fri Having said that, the two cartridges are vastly different with different uses and capabilities, the .308 being far more versatile. Bear Creek Arsenal Code 704tactical for 5% OffBCA AR-15 Complete Upper Assembly, 16" 4150 Parkerized Heavy Barrel, .450 Bushmaster, Carbine Length Gas System. These uppers will mount right on your mil. Before you spring for something cheap, remember that the .450 Bushmaster is going to put a lot of stress on your upper and cheap builds will wear down quickly. The.450 Bushmaster is a versatile hunting round that has become particularly popular for hog hunting. In the .450 Bushmaster's corner is Hornady 's 250-grain FTX load, which has a listed muzzle velocity of 2,200 fps, is topped with a flex-tip bullet and has a ballistic coefficient (BC) of .210. Fax: +1-866-534-3097 Heavy profile, the fire tube adds heft and reduces recoil, though if you need a bit more in that area youll have to shop brakes and compensators since Bear Creek outfits the barrel with a flash hider. You want an upper that includes a five-round magazine. Complete .450 Bolt Carrier Assembly $ 174.95 Read More; Windham Weaponry .450 Bolt Assembly $ 79.95 Read More; Windham Weaponry .450 Bushmaster A2 Style Flash Hider 11/16 x 24 T.P.I. . Shop now and get Free Value Shipping on most orders over $49 to the Bushmaster A2 Post Ban AR-15 Complete Upper 223 Rem/5.56 20 in Heavy Chrome Lined Barrel (92546) $ 491. And the AR sports a carbine-length gas system. It is large and heavy, despite being designed around lightweight. Want to land that kill shot or that bullseye? All you have to do is pop open your takedown pins on the bottom, take off the existing upper, and drop this shiny new one in its place. These barrels are precision machined from a 4150 Mil-Spec steel blank with a 1:24 twist. . It also includes some components made by Tromix, a very well-respected name in the big-bore AR game. Worry not, because Radical Firearms has made the exact same feature set available with a 16 barrel with minimal changes. You want a chrome moly-lined chamber and bore for easy cleaning and better barrel longevity. Bushmaster FLTTOP REC 450 UPPER 20" This is a comlete upper in .450 Bushmaster Caliber with 20" barrel and Izzy Suppressor. Be sure your chosen upper supports your hunting style and provides ample space to support your hunting style. $869 00. Though its not a standard, you may even add an ejection port or a forward assist for a reasonable sum. Bushmaster has you covered on your next AR build or upgrading project chambered in 5.56mm, .300 Blackout, or 7.62mm. This package also includes everything you need to hit the ground running in your quest for a big game at an amazing price point. Plus, it boasts a number of design enhancements that ensure it will perform for the long haul, such as the uppers truss pocket. The .650 Bushmaster ammo type is a big cartridge and packs a real wallop, so a strong construction is essential to not only ensure it delivers the ammo properly but to also make sure it does not wear down over time. You have entered an incorrect email address! With fewer materials involved in the build, it would be nice to see a bit of a discount, but its still an excellent deal regardless, so we wont nick it too much. If for any Whereas you might want to pass on a complete package that charges for things you dont want, it only makes sense to save money and go with a package if youre liable to buy these extras elsewhere. Radical Firearms also includes a forward assist, charging handle, bolt carrier group, and a dust cover. Save my name, email, and website in this browser for the next time I comment. However, picking an upper receiver can be a big commitment and you should be sure to get a top-quality one. The cartridges themselves are not compatible in any way, and the tapered lugs on the bolt won't work interchangeably with one designed for a 5.56 NATO. Nonetheless, we still think that all the features combine to make for a great value. Features. More Reading: .450 Bushmaster scope buyer guide. If youre looking for a well-constructed complete upper thats assembled and ready for installation, then this might just be the one youre looking for. Yes, you can convert your AR 15 by swapping out to a 450 Bushmaster complete upper. The complete upper also includes an ambidextrous charging handle, MLOK handguard and a Unique muzzle brake made in-house by Next Level. Weve rounded up some amazing solutions for getting a .450 Bushmaster-compatible upper receiver on your build, but not all are created equal or there would be no reason for our list. Learn how your comment data is processed. Gabe VanWormer takes a Bear Creek Arsenal .450 Bushmaster upper to the range to see how it performs. APF 450 Bushmaster Carbine Complete Upper Receiver $789.99 (Save $50.00) $739.99 Next Level Armament 450 Bushmaster Complete Upper $1,410.00 (Save $121.00) $1,289.00 Brenton USA Guide 18in .450 Bushmaster Upper Receiver $1,349.99 (Save $80.00) $1,269.99 If youre a down-and-dirty tinker, you can break out your Dremel and a file grind away yourself, as long as youre confident you wont Bubba up the job. You want an ejection port cover or forward assist option thats available for a very log additional fee. While it doesnt include as many extras as our aforementioned picks, its nonetheless a great package and comes at an affordable price. APF 450 Bushmaster Carbine Complete Upper Receiver $789.99 (Save $50.00) $739.99 3 models POF USA Minuteman 16.5 in Barrel .350 Legend Upper Receiver Assembly As Low As (Save Up to $66.00) $1,040.00 Newly Added 5 models Brenton USA Scout 18in .450 Bushmaster Upper Receiver $1,349.99 (Save $80.00) $1,269.99 Where you put your emphasis matters, but the choice of which is right is yours alone. Custom Aero Precision STS15 .450 Bushmaster Pump Action Rifle AR-15 AR-308. MSRP: $244.99; bearcreekarsenal.com. Their new Elite 452 AR-Trigger assembly is terrific. The Bushmaster BA50 is a bolt-action, magazine-fed rifle designed to shoot the .50 BMG cartridge. Usually Ships in 24 Hours. Nevertheless, it is definitely possible to find a great upper receiver that is able to accommodate both your style and budget. an enlarged port. In other words, it packs some exceptional power. In addition to what you've stated, Bushmaster also provides the following attributes on their 450 Bushmaster rifles/carbines: 1) widened ejection port to help the larger cases eject 2) barrel extension with a single wide feed ramp 3) upper receiver w/o M4 style feed ramps Posted: 6/30/2009 1:13:25 PM EDT [#5] Quoted: Never fear lefties, its ambidextrous. If you dont trust yourself, but still want to start from scratch, there are .450 Bushmaster upper receivers on the market, complete with precision milled ejection ports. If youve done your part in researching, you may not even need gunsmithing skills and this could save you some money. Bear Creek Arsenal "Caliburn" AR-15 10.5" 450 Bushmaster, Carbine Gas, Hbar, 1-24T Parkerized Barrel . That and its fairly expensive appetite. Shop online for the best selection and prices of 450 Bushmaster rifles at Hinterland Outfitters. It comes with a Picatinny-style rail so you can add many accessories. Michael Lutes is the managing editor and owner at Gun Mann. Here is the link to BCA's site. Those looking for a superior 20 upper to complete their big-bore AR-15 build need look no further than this offering from Radical Firearms. 450 BUSHMASTER achieves one-shot, one-kill for large game inside 250 yards by delivering a 45 caliber, 250 grain projectile at 2200 fps from the muzzle of an AR-15. No, but a 450 Bushmaster upper combined with a multi-cal. Add the hard-hitting punch of the 450 Bushmaster to your Bushmaster lower receiver instantly. Here are a few qualities and features that you might want to pay attention to distinguish a great upper receiver from one thats cheap in quality. Before you know it, your newly built or upgraded rifle will be a force to be reckoned with, out in the field or on the range. Great Lakes Firearms AR-15 Rifle, .450 Bushmaster, 18" 416r SS Barrel, 15.25" M-LOK Rail, 6 Position M4 Stock, White Cerakote Finish- GL15450SS WHT. But, before you invest your hard-earned money be sure to go through our guide to better understand what separates winners from the duds. This is the perfect upper to have on hand if you are looking to do a complete upgrade of your AR-15 rifle. This.450 Bushmaster Rifle Upper Build Kit is for you if you want a huge, booming round that hits hard. Just pop open your takedown pins on the bottom, take off the existing upper, and drop this shiny new upper in its place. Davidson Defense 'Sea Krait' 16" AR-15 .450 Bushmaster Manganese Phosphate Rifle Upper Build Kit, Davidson Defense 'Osiris' 18" AR-15 .450 Bushmaster Manganese Phosphate Rifle Upper Build Kit, Davidson Defense 'Sea Krait' 16" AR-15 .450 Bushmaster Manganese Phosphate Rifle Complete Upper Build Kit, Davidson Defense 'Bola' 16" AR-15 .450 Bushmaster Manganese Phosphate Rifle Full Build Kit, Davidson Defense 'Bola' 16" AR-15 .450 Bushmaster Manganese Phosphate Rifle Complete Upper Build Kit, Davidson Defense 'Bola' 16" AR-15 .450 Bushmaster Manganese Phosphate Rifle Upper Build Kit, Davidson Defense 'Submediant' 16" AR-15 .450 Bushmaster Manganese Phosphate Rifle Complete Upper Build Kit, Davidson Defense 'Submediant' 16" AR-15 .450 Bushmaster Manganese Phosphate Rifle Upper Build Kit, Davidson Defense 'Sea Krait' 16" AR-15 .450 Bushmaster Manganese Phosphate Rifle Full Build Kit.