Grid Defense 16" .450 Bushmaster Upper Receiver - Black

• Hard Coat Black Anodized Finish
• Chambered in .450 Bushmaster
• 14" Free Floating M-Lok Handrail
• 16" 4150 Black Nitride Barrel
• 1:24 Twist Rate
• 5/8x32 TPI Thread Pitch
• .875 Gas Block
• Carbine Length Gas System
• A2 Flash Hider
• Mil-Spec 7075-T6 Upper Receiver