This insert cap fits inside the Tactical RIS Handguard and attaches to the tactical or other 1-inch barrel. Comes with 4 x M4x6 socket set screws (Driver: 2.0mm)
For use with these Handguards
Dimensions:
OD: 1.47" or 37.4mm, ID: 1" or 25.2mm, W: 1.89" or 48mm