Expo Arms® Handguards are machined from high-quality 6061-T6 aluminum bar stock, allowing for a slim profile with plenty of M-LOK slots for attaching grips, lights, and other accessories. This is a free float handguard that comes with a 6061-T6 aluminum barrel nut and anti-rotation tabs for an extremely strong lock up that will hold tight on any Mil-Spec receiver. At 15” in length, this M-LOK handguard will run great on any 16” AR-15s and has plenty of internal diameter for compatibility with low profile gas blocks.