Samson SXT Series MLOK 9 in Handguard Black. " The NEW SXT Series Handguards are a rugged free-floating AR-15 handguard with an M-LOK attachment system. The simple clamping system uses two cross bolts which fit into the barrel nut for a rapid and easy installation. (The old SXS Series clamping system used a bias block on the bottom to secure the forearm to the barrel nutwhich required knurling). Specifications for Samson SXT Series MLOK Handguard: Manufacturer: Samson Color: Black Condition: New Features of Samson SXT Series MLOK Handguard Easy to install mount clamping system Free float design Package Contents: Samson SXT Series MLOK Handguard Samson 01-06131-01: SXT Series MLOK 9 in Handguard Black