The fn 15 military collector series m4 brings to market a military replica rifle made to fns, and the u.S.Military's exacting specifications.The semi-automatic rifle features a 16-inch, 1:7 rh, button-broached, and chrome-lined barrel.The uid-labeled lower receiver is equipped with an ambidextrous selector switch, just like its select-fire big brother, the m4a1.Metal Finish: BlackAction: Semi-AutoCaliber: 5.56x45mm NATOBarrel Length: 16"Capacity: 30+1Safety: AmbidextrousOal: 30.50"- 34.20"Weight: 6.60 lbsStock Description: 6 Position CollapsibleMuzzle: A2 CompensatorReceiver Material: AluminumSights: A2 Front, Adjustable RearBarrel Description: Button-Broached Chrome-LinedTwist: 1:7"Barrel Length Range: 16" to 16.99"Weight Range: 6 lbs to 6.99 lbsHand: RightStock Finish Group: BlackMetal Finish Group: Blued/Black