Windham Weaponry has developed this quality, Picatinny railed, M-LOK compatible forend for our standard aluminum receiver rifles (we also offer a version for our Carbon Fiber receiver rifles). These are 100% CNC machined from American made 6063 aluminum extrusions to exacting tolerances, then hard coat black anodized to Mil SPEC 8625. They are machined for maximum weight reduction while retaining rigidity and strength, and the top Picatinny rail is manufactured to MIL STD 1913. The M-LOK system mounting points are manufactured to Magpul mechanical specifications to ensure perfect fit with all Magpul accessories. Built-in Q.D. Sling Swivel pockets at 3:00 & 9:00 forward positions on the hand guard offer convenient mounting for your sling of choice. The American made Barrel Nut is 100% CNC machined of 4140 pre heat-treated steel (28 to 32 Rockwell hardness), drilled for weight reduction, and black nitrite finished (a QPQ corrosion resistant finish). These handguards feature the Windham Weaponry logo engraved into side panels. Available in 7.25 inch, 13 inch and 15 inch in lengths.