Complete Upper Receiver - 7.62x39 - 8" Barrel - 7.2" MLOK

• Upper
• Barrel Length- 8”
• Barrel Material- 41V50 Button Rifled Barrel
• Chamber 7.62x39
• Twist Rate 1:9.5
• Muzzle Device Milspec A2 birdcage 5/8-24
• Extension- M4
• Gas System- Pistol length
• Gas Block- Low profile .750 Nitride Finish
• Upper Receiver- Forged 7075 T6 Aluminum, Precision Machined to M16/M4 Spec
• Handguard- 7.2”, 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
• 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
• S7 tool steel ejector and extractor retaining pin
• 4130 Gas Key, nitride, precision staked using our hydraulic staking machine
• Carrier Key Screws- T25 drive, Grade 8, Properly Heat Treated

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