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Add the hard-hitting punch of the 450 Bushmaster to your Bushmaster lower receiver instantly. AR-type gas operating system drastically reduces recoil for excellent second shot control.
• Aluminum forearm free-floats the barrel for optimum accuracy
• Heavy barrel is hard-chrome lined in bore and chamber for exceptional durability and has 1 in 24" twist rifling, optimized for the .450 bullet
• Includes 5-round 450 Bushmaster magazine (1)
• Bolt carrier assembly