The CMMG AR-15 barrel nut is a mil-spec steel barrel nut used to secure the barrel to the upper receiver. It is the right part for a standard-pattern upper build or for replacing a damaged nut during a repair. CMMG has been making AR-15 rifles and parts since 2002.
- Part: Barrel nut
- Fits: AR-15
- Spec: Mil-spec
- Material: Steel
- Use: Builds or repairs
- Manufacturer part #: 55DA296
