The colt m5 carbine features a completely redesigned lower receiver and upper receiver with full ambidextrous controls and an enhanced upper receiver rail design which ensures extreme rigidity.- with maximum performance and ergonomics at the forefront of the design consideration the colt m5 carbine utilizes a proven carbine length gas system with colt's new purpose designed free float rail and upper receiver system.- the colt m5 carbine is truly the next generation in a long legacy of colt high performance rifles.Action: Semi-AutoCaliber: 5.56x45mm NATOBarrel Length: 16.10"Capacity: 30+1Safety: Safety Selector SwitchOal: 32"- 35.50"Weight: 6.80 lbsStock Description: CollapsibleReceiver Material: 7075-T6 AluminumSights: Flip Up Front & RearTwist: 1:7"Barrel Length Range: 16" to 16.99"Weight Range: 6 lbs to 6.99 lbsHand: RightStock Finish Group: Black