This CMMG 300 Blackout upper assembly with 16.1 inch barrel is engineered for custom AR15 builds. The M4 barrel extension comes pre-installed, and each barrel sub-assembly is properly headspaced.
AR15 Barrels
CMMG 300 Blackout 16.1 Inch Barrel Sub-Assembly Rifle
$202.00
CMMG 300 Blackout upper assembly with 16.1 inch barrel, pre-installed M4 extension and factory headspaced for immediate AR15 integration. Purpose-built for custom builds without guesswork.
Availability: Only 2 left in stock
CMMG
| Weight | 3 lbs |
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| Dimensions | 18 × 2.5 × 2.5 in |
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