CMMG Barrel Sub-Assm, 16.1″ MT 4140CM SBN, 300 BLK

$189.95 $129.95

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SKU: 30D120A Category:


Perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced.

16.1″ Barrel
Medium Taper Profile
Gun Quality 4140 Chrome Moly
Salt Bath Nitride Finish inside and out
1:7 Twist Rate
300 AAC Blackout Chamber
Threaded 5/8-24
Carbine length gas port
.750″ Gas block Journal


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