18" 450 Bushmaster AR-15 Upper Assembly | 1x24 CMV Parkerized Mid Length HBAR Barrel | Compensator | 15" MLOK Rail
The 450 Bushmaster is more than just a big-bore cartridge; it’s a high-impact solution for the AR-15 platform that brings the devastating power of a 45-70 Government to a modern semi-auto. This system thrives with heavy, large-diameter projectiles, specifically tuned for 250gr to 300gr loads to provide unrivaled kinetic energy at short-to-medium ranges. If you're building a dedicated heavy-timber hunting rifle or a brush-busting predator rig, a 450 Bushmaster upper assembly offers the massive stopping power and bone-crushing performance required to push the limits of the small-bore gas gun.
Ballistic Barn uppers are American Made and machined by manufacturers of mil-spec AR-15 components. All barrels are individually checked for headspace using Manson go and no-go gauges.
Specifications:
- Upper Receiver: AR15 BIG BORE forged aluminum upper receiver with forward assist and dust cover assembly installed. Matte black hard coat anodized Mil 8625 Type 3 Class 2. Forged from 7075 T6 aluminum. 7075 Aluminum is superior in strength to 6061 billet aluminum.
- Handguard: Premium, Lightweight 15" Extended Rifle Length Narrow-Profile AR15 M LOK Handguard. Fit and finish on our line of ergonomical free float rails is outstanding and light weight. M LOK slots run the entire length of our rail at the 3, 6, and 9 o'clock positions. M LOK compatible rail sections and attachments can easily be attached to our handguards which makes adding accessories like sights, bipods, flash lights, grips, lasers, etc. a breeze. Matte black hard coat anodized Mil 8625 Type 3 Class 2. Milled from 6061 aircraft aluminum.
- Barrel: 18 inch 450 Bushmaster Chrome Moly HBAR profile Barrel with 1x24 twist. 5/8x32 muzzle threads. Parkerized Finish. Standard AR15 Big Bore Barrel Extension w/ single feed ramp. Properly headspaced with Manson Go and No-Go Gauges.
- Gas Block: .750” Low Profile, Nitride Finish.
- Gas System: Mid Length Gas Tube.
- Muzzle Device: Compensator with crush washer.
Upper arrives assembled, ready to use and will fit all standard Milspec dimension AR 15 lower receivers.
This item is NOT a firearm and will be shipped directly to you, no FFL is required.
4 Reviews Hide Reviews Show Reviews
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Bushmaster upper
Thanks for shipping it quickly! This perfect for what I needed on my build. Had the rail cerakoted battle grey and it looks perfect. Only shot open sights at 50 yards but it cycles like it should.
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Great deal
Love how they had all the add-ons on one page, very easy to find. Upper looks great and mated nicely to my lower as planned.
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Stoked
Found this site on gunbroker and decided to take a look. I was super stoked to see the cerakote options so I ordered one in FDE. Shipped next morning and was packed very well. The cerakote is top notch. Will be ordering again from here.
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Bagged a deer with it!
Have been wanting a 450 Bush for awhile now and glad I found this one with a coupon. Amazingly accurate. Sighted in in 7 rounds and was off to the woods.
