The most innovative and modular HK variant handguard on the market, the Aim Sports M-Lok HK forend can be used with all modern and traditional shooting techniques. CNC machined aluminum construction makes for a solid, sturdy component, with U.S. made mounting hardware. Still sleek and lightweight, the original lines of the rifle are retained while still offering all the benefits of modern accessories. Each rail system is supplied with two modular top sections, one Picatinny and one M-Lok. Features: Compatible with most HK91/G3 variants Magpul M-Lok modular mounting system U.S. made steel mounting hardware 3.4 inches rail space forward of front sight Picatinny and M-Lok forward top rail included Drop-in, no gunsmithing required 5 or 8 rows of M-Lok for ultimate modularity