The Bravo Company Mfg / BCM MK12 Gas System (brand part no. BCM-18SS-KIT) is an 18-inch stainless steel barrel/gas kit built with a rifle-length gas system.

Key Specifications

• Measures 18 inches in barrel length.
• Built with a rifle-length gas system.
• Constructed from stainless steel.
• Rifled with a 1-8 twist rate.
• Sold under BCM’s MK12 product line.
• Classified as a firearm part/accessory, not a regulated firearm itself — no FFL transfer required to purchase.

Frequently Asked Questions

What does ‘MK12’ refer to? MK12 is BCM’s product line name for this 18-inch rifle-length gas system kit, modeled after the MK12 SPR-style rifle configuration.

What gas system length does this use? It uses a rifle-length gas system, matched to the 18-inch barrel length.

What twist rate does this barrel use? It’s rifled with a 1-8 twist rate.

Buy the BCM MK12 18-Inch Stainless Steel Rifle-Length Gas System

Order the BCM MK12 18-Inch Stainless Steel Rifle-Length Gas System today for fast, insured shipping from a Lubbock, TX gun shop. Browse more Bravo Company Mfg / BCM parts in our gun parts category.