CMMG Inc M4 4140CM SBN 9mm Barrel Sub-Assembly 16.10" Md: 90D1A0A

CMMG M4 4140CM SBN 9mm Barrel Sub-Assembly, 16.10" Md: 90D1A0A
Perfect for building your custom 9mm AR15 upper group



Features:

- M4 Profile

- 4140 Chrome Moly

- Salt Bath Nitride Finish Inside and Out

- .750 Carbine Length Journal



Specifications:

- Caliber: 9x19mm NATO

- Barrel Length: 16.10?

- Rate of Twist: 1:10

- Threaded: 1/2-36

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