The Aero Precision AR15 ATLAS S-ONE M-LOK Handguard is a reliable mounting platform to host your favorite accessories and optics. Aero Precision machined these AR Handguards & Forends from 6061-T6 aluminum for optimal durability, and these handguards feature only front and rear Picatinny rails for weight reduction. This Aero Precision AR15 ATLAS S-ONE M-LOK Lightweight Handguard also features QD sling sockets at the 3, 6 and 9 o'clock positions for seamless sling attachment. These are compatible with Mil-Spec AR15 uppers and barrels, and they are also compatible with low profile gas blocks.