This 16" super duty rifle features a nanoweapon coated surefire closed-tine warcomp mounted to an in-house 16" mag phosphated cold hammer forge, chrome lined, 1-7 twist geissele barrel.Exclusive to the super duty 16" rifle is the ssa-e x with lightning bow trigger.This nanocoated, two-stage trigger features a wide body and bow shape that finds the perfect balance between a classic m4 trigger and a flat body trigger.The super duty lower is precision machined from 7075-t6 aluminum and features geissele's ultra duty lower parts kit featuring our ambidextrous super configurable safety and ultra precision trigger guard.A high quality mil-spec geissele buffer tube with a super-42 in h2 buffer ensures this rifle is properly tuned out of the box.Rounding up the package is a 15" mk16 super modular rail, that mates to the super duty upper receiver via a center aligning tab that removes any chance of rail rotation.Action: Semi-AutoCaliber: 5.56x45mm NATOBarrel Length: 16"Capacity: 30+1Trigger: SSA-E w/Lightning BowSafety: AmbidextrousStock Description: B5 Enhanced SopmodMuzzle: SureFire WarcompReceiver Material: Carbon SteelSights: None, Optic ReadyBarrel Description: Chrome-LinedTwist: 1:7"Barrel Length Range: 16" to 16.99"Hand: RightStock Finish Group: BlackMetal Finish Group: Blued/Black