The centerfire x-series of firearms are cnc machined from billet aluminum and feature tactical ar styling.Its unique design provides a picatinny rail for mounting various optics and sights, a tapping hole sin the hand guards that provides mounting of accessory rails, and a collapsible stock for a comfortable fit.This model has a 16" barrel and a black finish.Metal Finish: BlackAction: Semi-AutoCaliber: 9mm LugerBarrel Length: 16"Capacity: 17+1Trigger: StandardSafety: Manual ThumbOal: 32"- 36"Weight: 6.25 lbsStock Description: 6 PositionReceiver Material: AluminumSights: Optic ReadyBarrel Description: Aluminum AlloyTwist: NoneBarrel Length Range: 16" to 16.99"Weight Range: 6 lbs to 6.99 lbsHand: RightStock Finish Group: BlackMetal Finish Group: Blued/Black