Complete AR15 Upper Receiver - 5.56 - 11.5" Barrel - 9.8" MLOK

(1 review)
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  • Barrel Length-11.5”
  • Barrel Material- 41V50 Button Rifled Barrel
  • Chamber 5.56 NATO
  • Twist Rate 1:7
  • Muzzle Device Milspec A2 birdcage
  • Extension- M4
  • Gas System- Carbine length
  • Gas Block- Low profile .750 Nitride Finish
  • Upper Receiver- Forged 7075 T6 Aluminum, Precision Machined to M16/M4 Spec
  • Handguard- 9.8”, High Quality 6061 T6 Material Mlok with Proprietary Clamping System and Heavy-Duty Barrel Nut


  • M16 Auto Profile Carrier Machined from Aircraft/ Bearing Quality 8620 Steel, Properly Heat Treated, Ground to Perfection, BlackNitride Finish by H&M
  • Bolt is machined from a single piece aircraft/bearing quality 9310 steel, heat treated properly, precision ground, Shot Peened and MPI’d
  • Firing pin is machined to the mil-spec print from 8740, precision ground, and chrome plated
  • One Piece Billet Fully Machined Enhanced Extractor, Phosphate coated for Increased reliability and corrosion resistance
  • Nitride Cam Pin
  • S7 tool steel ejector and extractor retaining pin
  • 4130 Gas Key, nitride, precision staked using our hydraulic staking machine
  • KAK Carrier Key Screws- T25 drive, Grade 8, Properly Heat Treated

All KAK complete upper receivers are test fired for feed and function using commercially loaded ammunition



  • 3
    Upper 11.5

    Posted by Cj Cook on July 10, 2023

    As the gun heated up I noticed my groups started to get larger in sized after about 2-3 magazines. Groups went from 1.5-2moa with standard ball ammo to about 3-3.5 at times.