The SXT Series Handguards feature a 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 nut which required knurling). Inside diameter 1.25", Outside diameter 1.60".
Check out the entire range of products from Samson.