CMMG MK4 Receiver Extension Nut

The CMMG MK4 Receiver Extension Nut is a castle nut that works with all AR-15/MK4 carbine receiver extension tubes.
$9.99
In Stock
SKU
55CA9CB
The CMMG MK4 Receiver Extension Nut is a castle nut that works with all AR-15/MK4 carbine receiver extension tubes.
More Information
SKU55CA9CB
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