CMC Triggers 81621 AR-15 Gas Tube - Black Nitride 304 Steel 6.705"

The CMC Triggers 81621 Gas Tube delivers reliable gas system operation for AR-15 platforms with its precision-engineered 304 stainless steel construction. Black nitride coating provides enhanced corrosion resistance and reduced friction for consistent cycling across thousands of rounds.

What Makes This Different

Unlike standard gas tubes that rely on basic coatings, this CMC component features black nitride treatment that penetrates the steel surface for superior durability. The 304 stainless steel construction resists heat warping and maintains dimensional stability under rapid fire conditions. Precision manufacturing ensures proper gas port alignment and optimal pressure transfer to the bolt carrier group.

Key Features

• 304 stainless steel construction for heat resistance and longevity
• Black nitride coating reduces friction and prevents corrosion
• 6.705-inch length compatible with carbine gas systems
• Precision-machined gas port for consistent pressure regulation
• Heat-treated steel maintains shape under extreme temperatures
• Direct replacement for factory AR-15 gas tubes
• Smooth interior finish promotes unrestricted gas flow

This gas tube maintains consistent pressure regulation across temperature extremes, from sub-zero conditions to sustained rapid fire scenarios. The nitride treatment creates a harder surface than traditional phosphate coatings, extending service life in high-volume shooting applications. Competition shooters and tactical operators benefit from the reliable cycling performance during extended shooting sessions.

Technical Specs

• Length: 6.705 inches
• Material: 304 stainless steel
• Finish: Black nitride coating
• Compatibility: AR-15 carbine gas systems
• Inside diameter: Standard .750 inches
• Weight: Approximately 0.5 ounces
• Manufacturer: CMC Triggers
• Model: 81621

The CMC 81621 Gas Tube represents a significant upgrade over standard components through its advanced materials and coating technology. Professional armorers and serious shooters choose this component for builds requiring maximum reliability and longevity.