The Stag 15 Classic Rifle is the high quality, durable, military proven M4 design rifle you've been looking for. Made to mil-spec standards, this rifle satisfies the need for a standard GI carbine. The Stag 15 M4 features a 5.56x45mm NATO chamber 16" 1/7 nitride barrel with our slimline free-float handguard, a mil-spec trigger guard, a six position buttstock, A2 birdcage flash hider and a mil-spec nitride M16 BCG. Every complete AR15 rifle from Stag Arms comes with a Transferable Lifetime Warranty, an Infinite Shot Barrel Guarantee. This Stag 15 has a Triggertech - AR-15 Duty Two-Stage 3.5lbs Flat Trigger installed. As well as a Medieval Muzzle Brake.