The NBS Free Float M-LOK Handguard is a no-nonsense American Made M-LOK compatible rail system designed for versatility and simplicity. It features a monolithic top rail and the remaining 7 sides all feature M-LOK attachment slots. Precision machined from 6061-T6 aluminum extrusions then type 3 hard coat anodized you can be sure that this handguard can withstand an incredible amount of abuse. Its slim profile feels great in the hand yet it can accommodate any true low profile gas block and even has enough clearance to recess some muzzle devices such as flash cans and linear compensators. It is a true do-anything rail system and the cost-value ratio makes it very hard to pass-up. 9" Length 6061-T6 Aluminium Type 3 Hard Coat Anodizing