Grunt - Pistol 300 Blackout AR-15 (Black)


  • Upper Receiver: Fully CNC machined from 7075-T6 aluminum for extreme precision and enhanced durability. Flat top picatinny design for versatility in mounting optics and other enhanced components. CNC engraved numbered rail system. M4 feed ramps for added reliability.
  • Lower Receiver: Incorporates the enhanced features of the upper receiver and also includes front magwell grip surface designed for the operator to grip and maintain weapon control even in the most extreme conditions. Beveled magwell entry allows faster magazine changes. Tension device to maintain rigidity between upper and lower receivers. Built in trigger guard eliminates the need for a flip down trigger guard.
  • Free Float: 7" Ultra lightweight slim profile designed for duty use. CNC machined 6061-T6 aluminum. Unique design offers ultra capture around the barrel nut eliminating the requirement for anti-rotation tabs. Eliminates harmonics from attached accessories, greatly improving weapon accuracy. Full length picatinny CNC engraved numbered rail at the 12 o'clock position. 2 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.
  • Fire Control Group: Single stage mil-spec.
  • Barrel: Match grade 4150V (chrome moly vanadium steel) 8" barrel with black nitride finish. 1:7 Twist.
  • Gas Block: Micro style steel for light weight and increased durability.
  • Bolt Carrier Group: M16 profile with properly staked gas key.
  • Finish: Type III Class 2 hard coat anodized.
  • Gas System: Direct impingement with pistol length gas system.
  • Grip: CAA G16 pistol grip with anti slip texture for positive weapon control. Center door opens to inside storage.
  • Magazine: Comes standard with 1 black metal magazine.
  • Weight: 4.8 lbs
  • Made in the USA!

Please allow up to three weeks to ship.

  Must ship to an FFL dealer. Dealers must email copy of their FFL and the buyer name to before any firearm can be shipped. For questions please call us at 843-851-0005.
  At this time, we do not manufacture an AWB compliant firearm and do not ship rifles to the following AWB states: NY, NJ, CT, CA, and MA.
  By proceeding with ordering, you agree to comply with local, state, and federal laws and understand that Lead Star Arms also complies with them.

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