Complete AR15 Upper Receiver - 5.56 - 12.5" Barrel Mid Gas - 11.7" MLOK

Complete AR15 Upper Receiver - 5.56 - 12.5" Barrel Mid Gas - 11.7" MLOK

SKU:
MO-450-1010-0063-A
$459.95
(1 review)
Current Stock:
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Description

• Barrel Length- 12.5”

• Barrel Material- 41V50 Button Rifled Barrel, Nitride

• Chamber 5.56x45 NATO

• Twist Rate 1:7

• Muzzle Device Milspec A2 birdcage

• Extension- M4

• Gas System- Mid-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- 11.7" High Quality 6061 T6 Material Mlok with Proprietary Clamping System and Heavy-Duty Barrel Nut

Weight- 3.89#

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
Caliber:
5.56
Platform:
AR15

Reviews

  • 5
    AR15 Complete Upper Receiver 5.56 - 12.5"

    Posted by Henry D on January 14, 2025

    The workmanship on this KAK upper is PHENOMENAL. The machining on the BCG is so clean and precise it's difficult to believe such quality can be had at this price-point (KAK: please don't read this sentence). There is so much about this upper that you typically have to add as an upgrade - like the BCG I mentioned previously, or the flash hider which is super nice with a solid portion at the bottom to prevent dirt and debris from being blasted into the air if you are shooting prone and is definitely not your typical mil-spec quality material or machining, to the charging handle which is very solid and rigid with a nicely-designed extended latch (I purchased one of the Radi_ns that we all love for this build but I am not bothering to use it - the KAK charging handle is GREAT). I ordered an adjustable gas block along with the upper and it came already installed. I've got Geiss_lle, BCM, DD, B&T, and other great stuff that I am very fortunate to be able to own, shoot and enjoy - this KAK upper and all of its components are easily on par with any of the manufacturers well all know and trust. If you haven't yet tried KAK, DO IT - you will be extremely pleased with your purchase. I'm looking forward towards my next build project or complete firearm purchase so that I can buy MORE of this KAK goodness!