Description
LEFT HAND UPPER
Upper
- Barrel Length-16”
- Barrel Material- 41V50 Button Rifled Barrel
- Chamber 5.56 NATO
- Twist Rate 1:7
- Muzzle Device- Pinned and Welded A2 Compensator 16″+ OAL
- Extension- M4
- Gas System- Rifle Length
- Gas Block- Low profile .750 Nitride Finish
- Upper Receiver- Forged 7075 T6 Aluminum, Precision Machined to M16/M4 Spec
- Handguard- 15”, High Quality 6061 T6 Material Mlok with Proprietary Clamping System and Heavy-Duty Barrel Nut
BCG (Chrome lined phosphate comes standard, K-SPEC Upgrade available)
- M16 Auto Profile Carrier Machined from Aircraft/ Bearing Quality 8620 Steel, Properly Heat Treated, Ground to Perfection, chrome lined phosphate comes standard
- 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
- 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
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