The Geissele Automatics Super Rail MK4 Handguard delivers a durable and precise upgrade for AR-15 platforms. Crafted from lightweight aluminum and finished with a black hardcoat anodizing, this 10-inch free-float handguard uses both M-LOK slots and a Picatinny rail for secure accessory attachment. 10-inch free-float aluminum handguard for AR-15 platforms M-LOK slots and Picatinny top rail for attachments Includes proprietary Geissele barrel nut for installation Designed for strength and effective heat dissipation, this handguard offers dependable performance and flexibility for a variety of customization needs.