12.5" 308 WIN MC 4140CM SBN BARREL SUB-ASSEMBLY

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CMMG 12.5" 308 WIN MC 4140CM SBN BARREL SUB-ASSEMBLY

12.5″
Medium Taper Profile
4140CM
Salt Bath Nitride Finish Inside and Out
1:10 Twist
308 WIN Chamber (also accepts 7.62×51 NATO)
Threaded 5/8-24
Mid-Length Gas Port
.750″ Gas Journal

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