Introducing the Samson Manufacturing 010612901: Unveiling our SXT Series Handguards that are constructed as free-floating handguards, specifically for AR-15. The modern design incorporates the M-LOK attachment system for increased functionality. It relies on a straightforward clamping mechanism, employing two cross bolts locked into the barrel nut, enabling swift and effortless installation. Please note: The previous SXS Series utilized a bias block on the underside for securing the forearm to the barrel nut, necessitating knurling. This product boasts an inside diameter of 1.25\" and an outside diameter.