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CMMG MK4 Receiver Extension Nut


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The CMMG MK4 Receiver Extension Nut is a castle nut that works with all AR-15/MK4 carbine receiver extension tubes.

Brands - Firearm Accessories CMMG
Firearm Part Type AR Lower
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SKU: 55CA9CB Categories: , , Tags: ,
CMMG MK4 Receiver Extension Nut is out of stock.

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  • Kansas City, KS
  • Lee's Summit, MO
  • Omaha, NE
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  • Lee's Summit, Missouri
  • Kansas City, Kansas
  • Omaha, Nebraska