18" 450 Bushmaster Upper - Chrome Moly HBAR Barrel - 15" MLOK Rail

18" 450 Bushmaster Complete Upper for AR-15 with CMV HBAR Barrel, 15" M-LOK Rail and Compensator

The 450 Bushmaster complete upper delivers big-bore performance to the AR-15 platform with the power of heavy .45 caliber projectiles in a modern semi-automatic design. Designed for 250gr to 300gr loads, the 450 Bushmaster provides tremendous energy and hard-hitting performance for hunting, heavy timber, and short-to-medium range applications. This upper combines a durable CMV HBAR barrel, free-float M-LOK handguard, and compensator for a dependable big-bore AR-15 hunting platform.

Quick Glance:

Caliber: 450 Bushmaster
Platform: AR-15 Big Bore
Barrel Length: 18 inches
Barrel Material: Chrome Moly Steel HBAR
Twist Rate: 1:24 Twist
Barrel Finish: Parkerized
Gas System: Mid Length
Handguard Length: 15 inches
Handguard Type: Lightweight Free-Float M-LOK
Upper Receiver: Forged 7075-T6 Big Bore AR-15 Upper
Gas Block: .750" Low Profile Nitride
Muzzle Threads: 5/8x32
Muzzle Device: Compensator with Crush Washer
Headspace Checked: Yes - Manson GO and NO-GO Gauges
Assembly: Fully Assembled and Ready to Install

Full Details:

Upper Receiver:
AR-15 Big Bore forged aluminum upper receiver with forward assist and dust cover assembly installed. Forged from 7075-T6 aluminum and protected with a matte black hard coat anodized Mil 8625 Type 3 Class 2 finish for durability and corrosion resistance.

Barrel:
18" 450 Bushmaster Chrome Moly HBAR profile barrel with a 1:24 twist rate. Features 5/8x32 muzzle threads, Parkerized finish, standard AR-15 Big Bore barrel extension with single feed ramp, and is properly headspace checked using Manson GO and NO-GO gauges.

Handguard:
Premium lightweight 15" extended rifle-length narrow-profile AR-15 free-float M-LOK handguard. M-LOK slots along the 3, 6, and 9 o'clock positions allow easy attachment of accessories including bipods, lights, grips, lasers, and other compatible accessories. Machined from 6061 aircraft aluminum with a matte black hard coat anodized finish.

Gas System:
Mid-length gas system paired with a .750" low-profile gas block featuring a durable nitride finish.

Muzzle Device:
Compensator installed with crush washer to help manage recoil from the powerful 450 Bushmaster cartridge.

Ready to Install:
This complete upper arrives fully assembled and ready to use. It is compatible with standard Mil-Spec dimension AR-15 lower receivers equipped for 450 Bushmaster.

Important:
This product is not a firearm and will be shipped directly to you. No FFL transfer is required.

Ballistic Barn AR-15 uppers are built with quality components and precision assembly practices. Every barrel is individually checked for proper headspace using Manson GO and NO-GO gauges to help ensure reliable function and accuracy.