7/8th Inch Tactical RIS Handguard Insert

Product
Information

OD: 1.47"  or 37.4mm,  ID:  7/8"  or 22mm,   W:  1.89"  or 48mm

-  This insertcap fits inside the Tactical RIS Handguard, for attachment of recon or 7/8 inch barrel.
-  Comes with 8 x M4x6 socket set screw, Driver: 2.0mm