Radical Firearms' RF-15 in .450 Bushmaster is a straight-wall cartridge AR-15 designed for deer hunting in states that restrict rifles to straight-wall cartridges. The 16-inch barrel handles the .450 Bushmaster's heavy projectiles reliably. The standard AR-15 lower is used with a modified bolt carrier group and barrel to accommodate the larger cartridge. Radical's in-house manufacturing keeps the price accessible for hunting applications. Type: Rifle Action: Semi-Automatic Caliber: .450 Bushmaster Capacity: 5 Year introduced: 2019, USA Weight: 68 oz Overall length: 32.5" Status: Active Intended use: Hunting, Target Shooting