Grunt(TM) Upper Receiver (MIL-SPEC): CNC machined from a 7075-T6 aluminum forging for extreme precision and enhanced durability. Flat top Picatinny design for versatility in mounting optics and other enhanced components. M4 feed ramps for added reliability. Grunt(TM) Lower Receiver (MIL-SPEC): CNC machined from a 7075-T6 aluminum forging for extreme precision and enhanced durability. Laser engraved markings including Lead Star(TM) logo and multi-caliber. 15" and 17" Grunt(TM) Handguard: CNC machined from 6061-T6 aluminum for extreme precision and enhanced durability. Eliminates harmonics from attached accessories greatly improving weapon accuracy. Four Picatinny slots at the 12 o’clock position for mounting backup sights. M-LOK slots at the 3 and 9 o’clock positions and full-length M-LOK at the 6 o’clock position for mounting only the Picatinny rail needed or accessories. Designed for compatibility with 16" barrels. Barrel:16" 4150V 5.56 NATO chamber. 1:7 Twist or 4150V or 223 Wylde chambered 1:8 twist with 1/2"-28 muzzle device threads. 300 BO is 1:8 twist, 762×39 is 1:10 twist. 300 and 762 has 5/8×24 thread Gas Block: Micro-style steel with black nitride QPQ finish for lightweight and increased durability. Bolt Carrier Group: M16 profile with black nitride QPQ finish and properly staked gas key. Carpenter C-158 black nitride QPQ finish bolt for maximum dependability. Gas System: Direct impingement with the mid-length gas system to reduce recoil and minimize wear on moving parts. Features black nitride QPQ finish gas tube for reducing signature and increased resistance to heat. Muzzle Device: Enhanced design compensator dramatically reduces recoil. Unique geometry minimizes muzzle rise for faster follow-up shots. Pre-drilled on the bottom for pinning muzzle brake to the barrel. Precision CNC machined steel. Black nitride coating for durability in extreme conditions. 300 BO and 762×39 have an A2 flash hider. Grip: Grunt Combat(TM) Grip. Black with rubber over-mold for maximum comfort and weapon control in all conditions. Stock: Lead Star lightweight carbine stock with 6 position adjustments. Magazine: Comes standard with 1 MagpulA(R) 30 Round MOEA(R) PMAGA(R) black magazine.
