A complete upper receiver chambered for the .450 Bushmaster cartridge, manufactured by Palmetto State Armory, typically includes the barrel, handguard, bolt carrier group, and charging handle. These components are pre-assembled, allowing for easy attachment to a compatible AR-15 lower receiver. This combination provides a powerful, large-caliber option ideal for hunting medium to large game at shorter to moderate ranges.
The appeal of this specific configuration lies in its blend of power and platform familiarity. The .450 Bushmaster round delivers significant stopping power, while the AR-15 platform offers modularity and widespread user familiarity. This accessibility, combined with Palmetto State Armory’s reputation for producing affordable firearms components, has contributed to the popularity of this particular upper receiver assembly within the hunting and shooting communities. Furthermore, the straight-walled cartridge design makes it legal for hunting in jurisdictions that restrict bottlenecked cartridges.