Complete AR15 Upper Receiver- 5.56, 18" Rifle Gas, Cold Hammer Forged, 15" MLOK

Complete AR15 Upper Receiver- 5.56, 18" Rifle Gas, Cold Hammer Forged, 15" MLOK

SKU:
MO-450-1010-146
$584.95
(1 review)
Current Stock:
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Description

• Barrel Length- 18”

• Barrel Material- 41V50 Button Rifled Barrel, Cold Hammer Forged, Chrome Lined Phosphate

• Chamber 5.56x45 NATO

• Twist Rate 1:7

• Muzzle Device Milspec A2 birdcage

• Extension- M4

• Gas System- Rifle Length

• Gas Block- Low profile .750 Phosphate Finish

• Charging Handle- Milspec with Enhanced Large Billet Latch

• 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

Weight- 4.6#

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
  • 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, 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

Additional Information
Length:
18"
Platform:
AR15
Finish:
Cold Hammer Forged & Chrome Lined Phosphate
Caliber:
5.56

Reviews

  • 5
    COMPLETE AR15 UPPER RECEIVER- 5.56, 18" RIFLE GAS, COLD HAMMER FORGED, 15" MLOK

    Posted by Chris on February 18, 2026

    I purchased the complete upper noted above in the review subject. I did order it with the following upgrades. I got the plan B radial muzzle brake, adjustable gas block and K-Spec dual ejector, side vent, sand cut rails, NP3 coated BCG. I put it on a Kak rifle lower. I’ve only had it to the range once since I got it about two weeks ago. It ran like a champ, flawlessly. I’m very happy with my purchase and the icing on the cake: I got 10% off with a coupon code! The only thing that I can complain about is that it is a little heavy and I wish the rail came with built in quick release sling mounts.