16" M4 Profile Barrel 5.56 (Carbine) + FREE .750 Gas Block + Gas Tube

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Product Code: KM55616M4-ACAR-UGB01-ACAR-UGT02
Quantity in Stock Quantity in Stock: IN STOCK
MSRP: $192.95
Sale Price: Sale Price: $87.75
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16" M4 Profile Barrel 5.56 (Carbine) + FREE .750 Gas Block + Gas Tube


  • 1 x Gas Tube (Carbine-length)
  • 1x Low Profile Micro Gas Block, .750"
  • 1 x 16" M4 Profile Barrel 5.56 (Carbine)

Low Profile Micro Gas Block, .750"

  • Low Profile Size Fits Underneath Most Free Float Handguards
  • Precision Machined from Steel to Exacting Tolerances for Optimal Fit on .750" Diameter Barrels at the Gas PorT
  • Includes Gas Tube Roll Pin, Serrated Self-locking Set Screws, and Installation Tool

Carbine-Length Gas Tube With Roll Pin

Includes Carbine length gas tube and the 5/64" x 5/16" gas tube roll pin.

16" Barrel:

This 5.56 chambered 16" M4 Profile Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension.

Quench Polish Quench (QPQ) is a specialized type of nitrocarburizing case hardening that increases corrosion resistance. It is sometimes known by the brand name of Tufftride, Tenifer Black Nitride or Melonite. QPQ is a huge improvement over Chrome Lined barrels. Unlike chrome lining, where the chrome is built up on the surface, QPQ converts the surface without the risk of dimensional build up. 

  • Length - 16"
  • Material - 4150 Chrome Moly Vanadium
  • 11-Degree Target Crown - Further improve accuracy
  • Profile - M4
  • Finish - QPQ Corrosion Resistant
  • Gas System Length - Carbine
  • Gas Block Journal - .750" Gas Block Journal
  • Twist Rate - 1/7 Twist
  • Muzzle - 1/2x28 Threaded
  • Weight - 28oz