-
Expo Arms Stainless Steel Gas Tube – Carbine Length
$10.99Expo Arms Stainless Steel Gas Tube – Carbine Length The Expo Arms Carbine-Length Gas Tube is a dependable replacement or build component for rifles using a carbine-length gas system. Constructed from... -
Expo Arms Low Profile AR-15 Gas Block – Nitride – Set Screw – .750"
$22.95Expo Arms Low Profile AR-15 Gas Block – Nitride – Set Screw – .750" The Expo Arms Low Profile .750 Gas Block provides a compact, secure gas-system mounting solution for compatible AR-15 and AR-308... -
-
-
Description
Product Overview
Ensure smooth cycling and long-term operating reliability for your carbine-length AR-15 build with the CMC Triggers Carbine Length AR-15 Gas Tube in Black. Precision-machined from high-grade 304 stainless steel, this gas tube is engineered to strict dimensional tolerances to deliver consistent gas flow into your bolt carrier key under heavy firing schedules.
Finished with an advanced Salt Bath Nitride treatment, the CMC gas tube offers superior surface hardness, reduced carbon adhesion, and exceptional resistance to heat, corrosion, and wear. Its sleek black aesthetic eliminates reflective stainless steel glare under custom handguards while maintaining 100% duty-grade reliability.
Key Features
- Precision Machined 304 Stainless Steel: Machined from high-strength 304 stainless steel for ultimate heat tolerance and structural integrity.
- Durable Nitride Finish: Black Salt Bath Nitride coating dramatically increases corrosion, fatigue, and wear resistance.
- Consistent Gas Flow: Ensures precise gas metering to optimize bolt carrier timing and prevent cycling failures.
- Reduced Carbon Buildup: Slick nitride surface finish prevents heavy carbon fouling from adhering to the tube walls.
- Carbine Length Spec: Standard carbine gas system length designed for standard AR-15 barrel gas ports.
- Made in the USA: Proudly manufactured, machined, and finished in the United States.
Specifications
| Brand / Manufacturer | CMC Triggers |
|---|---|
| MPN | 81622 |
| UPC | 859464006314 |
| Platform Compatibility | AR-15 / M4 Platforms |
| Gas System Length | Carbine Length |
| Material | 304 Stainless Steel |
| Finish / Color | Durable Nitride / 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 increases the surface hardness of the 304 stainless steel, improving corrosion and heat resistance under rapid fire. Additionally, the smooth surface treatment makes carbon fouling easier to clean and provides a clean, non-reflective black appearance under handguards.
How do I know if I need a carbine-length gas tube for my barrel?
Gas tube length is determined by the distance between your barrel's gas port and the upper receiver. Carbine-length gas systems are standard on most 10.5", 11.5", and many 16" AR-15 barrels. Verify your barrel's gas system specification before purchasing.
Does this gas tube come with a roll pin for the gas block?
Gas block roll pins are typically supplied with your low-profile gas block assembly. However, standard mil-spec gas tube roll pins fit this tube directly.
Is this gas tube compatible with AR-10 / .308 receivers?
This model (MPN: 81622) is engineered specifically for AR-15 / M4 receiver dimensions. Some AR-10 / LR-308 platforms require longer, platform-specific gas tubes due to differences in receiver height and barrel extension lengths.
