A tactical workhorse the AR10TAC16 is the perfect tool for duty and defense. All Tactical Series Rifles include MAGPUL MBUS flip-up sights and MOE pistol grips. The dual purpose flash hiding compensator tames recoil while reducing signature. A sturdy 15-in. Key-Mod handguard provides ample hand space and a full length MIL-STD 1913 12 O'Clock rail for sights and accessories. Safety: Ambidextrous Gas system: Adjustable Model: AR-10 Tactical Rifle Caliber: 7.62X51 mm / .308 Barrel: 16 double lapped chrome line / chrome moly threaded 5/8x24 Rifling Twist: 1:11.25 RH Muzzle Device: Flash hiding compensator Front Sight Base: MIL-STD 1913 rail on 12 o clock postion of handguard Upper Receiver: Forged flat-top with MIL-STD 1913 rail 7075-T6 aluminum Lower Receiver: 7075-T6 aluminum (forged) Trigger: Two-stage precision Stock: Magpul STR multi-position collapsible Overall Length: 35.5 / 39.5 Weight: 8.4 lbs. Finish: Anodized aluminum upper/lower receiver Included with Rifle: One 25-round Magpul PMAG MBUS sights limited lifetime warranty