This RIS Standard Barrel Nut Adapter works with Tippmann TMC to attach the RIS hand guard. It will simply screw onto the front of the gun allowing your handguard to be free floating. For use with these RIS Handguards
Dimensions:
OD: 1.47" or 37.4mm, ID: 1 1/4" or 31.8mm, W: 1.89" or 48mm