Luth-AR BL-04A Gas Tube Carbine Length - 304 Stainless Steel

The Luth-AR BL-04A is a carbine-length gas tube designed as a direct factory replacement or upgrade for AR-15-pattern rifles chambered in 5.56x45mm NATO or .223 Remington. Machined from 304 stainless steel and finished to Army Spec heat treatment standards, this tube channels gas bleed-off from the gas block into the upper receiver's carrier key to cycle the action in a direct-gas-impingement system.

At a nominal 9.75 in overall length, the BL-04A matches the standard carbine gas system layout used on most AR-15 carbine barrels and serves as a drop-in component when the existing carbine gas tube is worn, damaged, or being replaced during a build. The corrosion-resistant 304 stainless steel construction stands up to the heat and fouling inherent to the gas system and provides long service life under both duty and recreational use.