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CMC Carbine Length AR-15 Gas Tube Black Nitride | 81622
Inc. TaxInc. TaxMSRP: Inc. Tax$17.99MSRP: -
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Faxon Firearms Mid-Length Gas Tube for AR-15 and AR-10/LR-308 Systems
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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.