CMMG Rifle Length Gas Tube Kit Stainless Steel 55DA196

Overview of the CMMG Gas Tube Kit, Rifle | 55DA196

When your AR-15's gas tube wears out or gets damaged, your rifle stops cycling. Gun enthusiasts, law enforcement armourers, and serious AR builders all face the same frustration: tracking down a quality replacement that actually fits and performs. The CMMG Gas Tube Kit, Rifle takes the guesswork out of the search. Part number 55DA196 is purpose-built for rifle-length gas systems and ships ready to install.

Built from High-Quality Stainless Steel

The 55DA196 is machined from premium stainless steel, delivering the corrosion resistance and dimensional accuracy needed for consistent gas flow and reliable cycling. At 15.125 in. long, it spans the full distance from gas block to upper receiver with a precise fit.

Everything Required for Installation

No hunting for the right roll pin. The kit ships complete with a 5/64 in. x 5/16 in. roll pin so you can finish your rifle-length build or armory repair without waiting on additional parts to arrive.

Key Features

• Material: High-quality stainless steel for long service life and superior corrosion resistance compared to mild steel alternatives
• Gas System Length: Rifle length, designed for AR-15 and .308 AR platforms running 18-inch to 20-inch barrels
• Tube Length: 15.125 in. overall, covering the full span from gas block to upper receiver on a rifle-length system
• Roll Pin Included: Ships with a 5/64 in. x 5/16 in. gas tube roll pin for securing the tube to your gas block; no separate hardware purchase required
• Finish: Natural silver stainless; resists rust and fouling under extended use
• Compatibility: Fits standard AR-15 and .308 AR rifles equipped with a rifle-length gas system and a .750 in. inner-diameter gas block
• MPN: 55DA196; matches CMMG's own AR-15 quality standards
• Made in the USA: Manufactured by CMMG, based in Fayette, Missouri

Specifications

Compatibility

The CMMG Gas Tube Kit, Rifle (55DA196) is compatible with AR-15 and .308 AR (AR-10 pattern) rifles that use a rifle-length gas system. Rifle-length gas systems are most commonly found on rifles with 18-inch or 20-inch barrels.

Compatible with:

• AR-15 rifles with a rifle-length gas system
• .308 AR / AR-10 pattern rifles with a rifle-length gas system
• Standard low-profile and standard-profile gas blocks with a .750 in. inner diameter

Not compatible with:

• Carbine-length gas systems (requires a separate carbine tube, approximately 7.5 in.)
• Mid-length gas systems (requires a separate mid-length tube, approximately 9.75 in.)
• Pistol-length gas systems

If you are unsure of your gas system length, measure the distance from your gas block to your upper receiver, or identify your barrel length. Most 20-inch barrels run rifle-length systems; 16-inch barrels typically run carbine or mid-length.

Intended Users

The CMMG Gas Tube Kit, Rifle is an ideal choice for anyone building, repairing, or upgrading an AR-15 or .308 AR with a rifle-length gas system.

Gun enthusiasts and AR builders putting together a new rifle-length upper will find this an essential component to source early in the build process. The stainless steel construction and included roll pin mean you can complete the gas system installation in one step with no additional trips to the hardware store.

Law enforcement armourers maintaining department-issued rifles benefit from keeping quality replacement gas tubes on hand. A worn or bent gas tube is a common cause of cycling failures, and a CMMG replacement restores the rifle to original spec quickly and reliably.

Military veterans and competitive shooters running rifle-length AR builds who want a durable, American-made gas tube over generic imported alternatives will appreciate the precision and corrosion resistance this stainless steel kit provides.

What's Included

• 1x CMMG rifle-length stainless steel gas tube (15.125 in.)
• 1x 5/64 in. x 5/16 in. gas tube roll pin

Note: A gas block is not included. A roll pin punch and hammer are required for installation and are sold separately.

Available at WCUniforms

WCUniforms is a specialty retailer serving law enforcement officers, military veterans, EMS professionals, and firearms enthusiasts across the United States, carrying the tactical gear and armory-grade components that field professionals rely on. Unlike big-box retailers that stock whatever moves volume, WCUniforms focuses on products that work when it matters. The CMMG Gas Tube Kit, Rifle ships directly from our Michigan warehouse so your build or repair stays on schedule. Shop with confidence at wcuniforms.com, where our team is ready to help you find exactly what your rifle needs.