Complete AR10 Upper Receiver - 243 Winchester - 19" Barrel, 15: MLOK

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KAK Complete AR10 Upper Receiver 243 Winchester, 19" Barrel, 15" MLOK

• Barrel Length- 19”

• Barrel Material- 41V50 Button Rifled Barrel

• Chamber 243 Winchester

• Twist Rate 1:10

• Muzzle Device- A2 birdcage 5/8-24

• Gas System- Mid length

• Gas Block- Lo profile .750 Nitride Finish

• Charging Handle- KAK Enhanced Large Billet Latch

• Upper Receiver- Billet 

• Handguard- MLOK 15”, High Quality 6061 T6 Material with Proprietary Clamping Tri-lug System and Heavy-Duty Barrel Nut



  • Auto Profile Carrier Machined from Aircraft/ Bearing Quality 8620 Steel, Properly Heat Treated, Ground to Perfection, BlackNitride Finish by H&M
  • Bolt- Dual Ejector, machined from a single piece aircraft/bearing quality 9310 steel, heat treated properly, precision ground, Shot Peened and MPI’d
  • Firing pin is machined 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 ejectors and extractor retaining pin
  • 4130 Gas Key, nitride, precision staked using our hydraulic staking machine
  • KAK Carrier Key Screws- Grade 8, Properly Heat Treated
  • All KAK complete uppers are test fired for feed and function using commercially loaded ammunition
243 Winchester