ERGO brings this receiver extension castle nut for M4 style receiver extension tubes.
- Standard Mil-Spec CAR castle nut
- Made from steel and coated black
ERGO CASTLE NUT FOR AR15 BLK
$6.99
- SKU:
- EG4971-B
- Model:
- Castle Nut
- Sub Category:
- Long Gun Parts
- Color:
- Black
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