KAK Complete AR15 Upper Receiver - 300 Blackout - 4.75" Barrel - 4" MLOK

KAK Complete AR15 Upper Receiver - 300 Blackout - 4.75" Barrel - 4" MLOK

SKU:
MO-452-1010-004-A
$439.95
(2 reviews)
Current Stock:
Description

Upper

  • Barrel Length- 4.75”
  • Barrel Material- 41V50 Button Rifled Barrel
  • Chamber 300 BLK
  • Twist Rate 1:7
  • Muzzle Device Milspec A2 birdcage 5/8-24
  • Extension- M4
  • Gas System- Carbine length
  • Gas Block- Low profile .750 Phosphate Finish
  • Upper Receiver- Forged 7075 T6 Aluminum, Precision Machined to M16/M4 Spec
  • Handguard- 4”, High Quality 6061 T6 Material Mlok with Proprietary Clamping System and Heavy-Duty Barrel Nut
  • Charging Handle- Milspec with Enhanced Large Billet Latch
  • Weight- 2.73#

BCG

  • 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 and staked

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

Additional Information
Caliber:
300 Blackout
Platform:
AR15
Tags:

Reviews

  • 5
    Customer service

    Posted by Kevin on February 12, 2025

    Kak’s customer service cannot be beat. They are active on places like Reddit firearms communities and address people’s issues without even being asked. I didn’t have any issues at all, but experienced their great customer service when asking them to make a couple of changes to this upper. They were friendly and accommodating and had one out to my specs in a day. They seem to be the only company out there selling high quality high tier parts for reasonable prices.

  • 5
    Amazing Upper

    Posted by Daniel Ovalle on July 29, 2024

    I bought an upper receiving 4.75 amazing all parts