CMC Triggers Mid Length AR-15 Gas Tube Black Nitride | 81623

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CMC Triggers Mid Length AR-15 Gas Tube Black Nitride | 81623

  • SKU: CMC81623
  • UPC: 859464006321
  • MPN: 81623
  • Availability: Usually Ships in 24 Hours
Availability: Usually Ships in 24 Hours

This item is available for backorder. Orders placed now will ship when stock is replenished.

Description

Product Overview

Ensure smooth cycling, optimal gas metering, and long-term operating reliability for your mid-length AR-15 build with the CMC Triggers Mid Length AR-15 Gas Tube in Black. Precision-machined from high-grade 304 stainless steel, this gas tube is engineered to exact dimensional tolerances to maintain a tight seal and deliver consistent gas pressure into your bolt carrier key.

Treated with a durable Salt Bath Nitride finish, the CMC mid-length gas tube offers enhanced surface hardness, superior corrosion resistance, and exceptional thermal fatigue strength under sustained firing schedules. Its sleek black aesthetic eliminates reflective stainless glare beneath free-float handguards while providing a slick, non-stick surface that resists carbon fouling buildup.

Key Features

  • Precision Machined 304 Stainless Steel: Crafted from heavy-duty 304 stainless steel for ultimate heat resistance and structural rigidity.
  • Durable Black Nitride Finish: Advanced QPQ Nitride treatment drastically increases surface hardness, wear resistance, and corrosion protection.
  • Consistent Gas Flow: Engineered for accurate internal geometry to ensure seamless cycling and reliable bolt carrier key engagement.
  • Resists Carbon Build-Up: Smooth nitride finish prevents carbon deposits from adhering tightly to the tube walls.
  • Mid-Length Specification: Standard mid-length gas system dimensions designed for popular 13.7", 14.5", 16", and 18" AR-15 barrels.
  • 100% Made in the USA: Proudly designed, machined, and finished in the United States.

Specifications

Brand / Manufacturer CMC Triggers
MPN 81623
UPC 859464006321
Platform Compatibility AR-15 / M4 / M16 Upper Receivers
Gas System Length Mid Length
Material 304 Stainless Steel
Finish / Color Durable Nitride / Matte Black
Country of Origin United States of America

Frequently Asked Questions

What are the advantages of a Nitride finish on an AR-15 gas tube?
A Nitride coating hardens the outer layer of the 304 stainless steel, significantly boosting resistance to heat fatigue and corrosion under heavy firing schedules. Additionally, it gives the gas tube a subtle black finish that eliminates unwanted reflections underneath skeletonized handguards.
How do I know if my AR-15 barrel requires a mid-length gas tube?
Gas tube selection depends on your barrel's gas port location. Mid-length gas systems are standard on most 14.5" and 16" general-purpose barrels, as well as select 13.7" and 18" configurations. Always check your barrel manufacturer's specifications to confirm gas system length before purchasing.
Does this gas tube come with a roll pin for gas block installation?
Gas block roll pins are typically included with low-profile gas blocks. However, this CMC gas tube is fully compatible with all standard mil-spec AR-15 gas tube roll pins.
Will this mid-length gas tube fit large-frame AR-10 / .308 rifles?
This gas tube (MPN: 81623) is designed to AR-15 specifications. While some AR-10 / .308 mid-length barrels utilize standard AR-15 gas tube lengths, others require slightly longer, platform-specific gas tubes. Always verify receiver geometry and barrel specs for large-frame builds.

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