CMC AR15/AR10 Gas Tube - Nitride Coated Carbine Length

The CMC AR15/AR10 Gas Tube — Nitride Coated Carbine Length (Part No. 81622) is a precision-machined piston component engineered to regulate gas cycling in direct impingement rifle systems. Built from 304 stainless steel and finished with a durable nitride coating, this gas tube ensures consistent bolt carrier group operation across extended shooting cycles and environmental conditions.

The nitride surface treatment significantly improves corrosion resistance, wear resistance, and fatigue strength compared to uncoated stainless steel. This is particularly critical in carbine-length systems where gas port pressures are higher and cycling speeds are faster. The coating also provides a cosmetic benefit without adding measurable weight—critical for duty rifles where every ounce matters. Proper gas tube selection directly impacts reliability: undersized or oversized tubes create cycling inconsistencies that manifest as short-stroking (failure to lock back) or excessive bolt velocity (premature wear). This CMC tube is manufactured to spec tolerances that ensure predictable dwell time and reliable function across factory and mid-load ammunition.

This component is essential for builders, armorers, and operators maintaining or assembling AR-15 and AR-10 platforms with carbine-length gas systems. Whether building a patrol rifle, duty carbine, or match rifle, gas tube selection impacts both short-term reliability and long-term durability. The carbine-length configuration is the most common specification across duty and civilian carbine builds. Made in the USA and backed by CMC's 100% lifetime warranty, this gas tube represents a verifiable no-compromise choice for serious rifle builds.