This J-5 Tactical .450 Bushmaster Complete Pistol Upper with a M-LOK hand guard is built by J-5 Tactical using only quality AR parts. This is a complete, AR-15 .450 Bushmaster Complete Pistol Upper M-LOK that is fully assembled and will perform without hesitation, consistently placing rounds where you aim. All J-5 Tactical .450 Bushmaster Complete Upper Receivers are tested prior to shipping. Great for your next Pistol or SBR build!
History of the 450 Bushmaster
The impetus for the .450 Bushmaster was actually a call-to-arms, so to speak, for a more effective, one-shot-and-done defense cartridge. The late and often controversial Col. Jeff Cooper—champion of big-bore knockdown power in both rifles and handguns—had long held that the U.S. military’s adoption of the 5.56 NATO cartridge was a mistake. He argued (as did many frontline soldiers) that the diminutive round was insufficient for getting the job done quickly in battle conditions. Cooper, always a fan of the .45 ACP pistol cartridge, envisioned a similar-sized pill designed for a carbine—something that would put the bad guy down with decisive, one-shot finality. Being a hunter as well as a tactical trainer and theorist, Cooper also acknowledged the benefits of such a round for big-game applications. Not cape buffalo or brown bear, perhaps, but certainly a score-settler for any of North America’s Cervidae family as well as hogs and black bear.