LT Low-profile gas block are necessary when extending your free-float handguard past your barrels' gas port. LT Gas Blocks are lightweight, strong and small enough to use with almost any handguard. They mount using three set screws located at the bottom, so gun-smithing will be needed on barrels without divots.
LT202-2 (0.625): Works with 5.56 PredatAR Barrels and other pencil-thin barrels with a 0.625" gas journal. Fits under most handguards. Minimal clearance needed.
Comes complete with mounting hardware, necessary tools and a vial of red Locktite