Breek Arms Steel Barrel Nut is 1 1/8 inch and comes with wide enough contact points for a standard crescent wrench to be used when tightening. The serrated design grabs the hanguards so there is no twist or rotation when firing.
These barrel nuts fit ONLY the following AR-15 Breek Arms Handguards
- Mach 2.0 models
- Forward Cut Models
- C-Cut models