Description
ERGO brings this receiver extension castle nut for M4 style receiver extension tubes.
Features:
- Standard Mil-Spec CAR castle nut
- Made from steel and coated black
Specifications:
- Manufacturer Id : FALCON
- Manufacturer : Ergo Grip
- Manufacturer Part # : 4971-B
- Model : Castle Nut
- Sub Category : Long Gun Parts
- Color : Black