Lantac M-Spec Rifle-Length Gas Tube – Stainless Steel

The Lantac M-Spec rifle-length gas tube (brand part no. 01MSPECGTRIF) is machined from stainless steel to mil-spec AR-15 dimensions, the small part responsible for carrying propellant gas from the barrel port back to the bolt carrier group. Every direct-impingement AR-15 depends on its gas tube to cycle reliably, and a worn, bent, or out-of-spec tube is a common source of short-stroking and other cycling issues. Lantac built this tube specifically for rifle-length gas systems, confirmed as a true mil-spec AR-15 accessory that drops in without modification. Builders and armorers replacing a damaged tube, or assembling a rifle-length upper from scratch, both need this exact component.

Key Specifications

• Machined in stainless steel for corrosion and heat resistance under repeated firing cycles.
• Sized for a rifle-length gas system rather than carbine or mid-length.
• Measures 17.35 inches in overall length.
• Outside diameter measures 0.45 inches, matched to mil-spec gas block and handguard clearances.
• Confirmed as a true mil-spec AR-15 accessory, requiring no modification to install.
• Channels propellant gas from the barrel port back to the bolt carrier group to cycle the action.
• Secures in the gas block with a standard roll pin.
• Sits beneath the handguard, spanning from the gas block to the bolt carrier key.
• Stainless construction resists the carbon fouling a gas tube is exposed to shot after shot.

Frequently Asked Questions

Will this fit a carbine-length gas system? No, this tube is sized specifically for a rifle-length gas system.

What causes a gas tube to need replacement? Bending, excessive carbon buildup, or simple wear can all cause cycling issues that call for a replacement tube.

Is this a direct mil-spec fit? Yes, it’s confirmed as a true mil-spec AR-15 accessory.

Buy the Lantac M-Spec Rifle-Length Gas Tube

Keep your rifle-length AR-15 cycling reliably. Order the Lantac USA M-Spec gas tube from our AR gas system lineup, and our Lubbock, Texas team can help confirm compatibility before it ships.