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CMMG
Overview
The CMMG MKGS Barrel is an 8-inch barrel designed for 9mm AR builds, offering a twist rate of 1:10 that provides optimal stabilization for a variety of bullet weights. This shorter barrel length is ideal for compact configurations, allowing for a lightweight and maneuverable setup without sacrificing performance. You'll commonly find this barrel in pistol-caliber carbine builds where portability and quick handling are essential.
Specifications
Available Merchants(4)
Prices checked
Stock Alert
Build history on GunPartPicker
Builders have been adding the CMMG MKGS Barrel 9mm 8" Black AR Rifles - 99D517A to their builds on GunPartPicker since February 2026. All time, it ranks #121 of the 840 barrels builders have added.
It was out of stock everywhere we track for all of September 2026, and today none of the 4 retailers we track has it in stock right now. Listed prices start at $371.45 at Brownells for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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