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.17" and 15" 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 threadGas 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 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: Loadstar lightweight carbine stock with 6 position adjustments.Magazine: Comes standard with 1 MagpulA(R) 30 Round MOEA(R) PMAGA(R) black magazine.
