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CMMG
Overview
The CMMG 16.1" 5.7x28mm Barrel Kit with BCG is designed to provide builders with a complete setup for firing 5.7x28mm ammunition in an AR platform. Featuring a 16.1-inch barrel length, this kit is optimized for a carbine-length gas system, which helps in achieving reliable cycling and reduced recoil, making it ideal for dynamic shooting scenarios. This barrel kit is commonly found in builds aimed at versatility and performance, particularly those tailored for varmint hunting or competitive shooting applications.
Specifications
Available Merchants(8)
Prices checked
Price Alert
Build history on GunPartPicker
Builders on GunPartPicker first added the CMMG 16.1" 5.7x28mm Barrel KIT with BCG for AR Platform to a build in February 2026.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 5 of the 8 retailers we track have it in stock. It dipped to $379.94 at BattleHawk Armory for a stretch in September 2026, under its usual $415.97 to $439.49, so sales do come around. Buying today, the lowest price is $406.49 at Ammunition Depot, above September's low of $379.94, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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