GORILLA MACHINING AR-15 .450 BUSHMASTER RIFLE KIT

AR-15 .450 Bushmaster Rifle Kits

The .450 Bushmaster round is built for power and precision—designed to bring big-bore performance to the AR-15 platform. Originally developed for hunting large game, this hard-hitting straight-wall cartridge delivers massive stopping power while remaining legal in states with straight-wall hunting laws.

Our .450 Bushmaster AR rifle kits include everything you need to complete a reliable, high-impact upper assembly. Each kit features a full M-LOK handguard, heavy-profile barrel, low-profile gas block, charging handle, forward assist, and other essential upper components.

Also included is a collapsible, adjustable stock with buffer tube, heavy buffer and spring, castle nut, and an ergonomic pistol grip. Whether you're hunting hogs, deer, or just want a serious big-bore build, this .450 Bushmaster kit delivers raw power with AR-15 versatility.