The Radical Firearms FGS rail was designed and manufactured right here in Houston. Our free float design offers the ultimate control for tactical, competition or sporting applications. Full length M1913 Picatinny rails along the top of the handguard allow for the mounting of any accessory. Along the 6-, 9-, and 12-o'clock positions the cutouts allow for either Magpul MOE attachments or our own FGSA attachments. At 1.8” inside diameter your suppressor easily fits inside and the cutouts on the rail aid in rapid cooling.