This CMMG complete upper assembly is chambered in .300 AAC Blackout. Simply add a rear sight, mount it to a complete AR-15 lower, and head to the range.
Specifications and Features:
CMMG AR-15 Complete Upper Assembly
.300 AAC Blackout
1:7" twist, 5/8-24 threaded
A2 Front Sight
M16 Bolt Group
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