Description
This 5.56 chambered 14.5" Gov 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. The technique is used when two or more of the following properties are required in a work piece:
Length - 14.5"
Material - 4150 Chrome Moly Vanadium
Profile - Goverment
Finish - QPQ Corrosion Resistant
Gas System Length - Mid
Gas Block Journal - .750″ Gas Block Journal
Twist Rate - 1/7 Twist
Muzzle - 1/2x28 Threaded
Weight - 25oz
SKU#: RTB556145GM
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