Shark Coast Tactical M-81 Features The Shark Coast Tactical M-81 runs a direct impingement operating system through a 16 chrome moly vanadium barrel that carries a black nitride finish and a Melonite-treated bore for extended barrel life. A 1:7 twist stabilizes the full range of common 5.56 NATO bullet weights and the threaded 1/2x28 muzzle accepts an A2 flash hider or a shooter s preferred compensator. The carbine-length gas system with a low-profile gas block keeps the action cycling reliably while M4 feed ramps and an M16 bolt carrier group support smooth dependable feeding from the 30+1 capacity magazine. A dry film lubed 7075-T6 forged upper with T-markings rounds out a receiver built for durability. The signature feature of this rifle is its M-81 Woodland Camo Cerakote hydro-dip finish blending deep greens rich browns and bold blacks across the receiver and 15 M-LOK handguard for a look inspired by classic military camouflage. Magpul SL-K adjustable stock and Magpul MOE grip give shooters a comfortable customizable point of contact for varied body types and shooting positions. A Picatinny rail sits atop the upper receiver for mounting optics or iron sights to suit the shooter s needs. Right-hand configured and weighing in around 6.6 lbs this Shark Coast Tactical M-81 rifle pairs a rugged field-ready build with a finish that stands out on the range or in the field. Shark Coast Tactical M-81 Specifications Manufacturer: Shark Coast Tactical Model: M-81 Caliber: 5.56 NATO Capacity: 30+1 Barrel Length: 16 Barrel Finish: Black Nitride Barrel Material: Chrome Moly Vanadium Twist Rate: 1:7 Operating System: Direct Impingement Receiver Finish: M-81 Woodland Camo Hydro-Dip Receiver Material: Aluminum Handguard: M-LOK Stock: Magpul SL-K Grips: Magpul MOE Thread Pattern: 1/2x28 Overall Length: 32.3 to 35.5 Weight: 6.6 lbs Available At: GrabAGun