Cross Machine Tool HDM Free Float AR-15 Handguard - ARCA / M-LOK - 17"

The Cross Machine Tool HDM ARCA Swiss Rail is a free float AR-15 handguard that integrates an ARCA Swiss mounting surface directly into the rail, letting shooters attach ARCA-compatible tripods and bipods without adding extra components to the rifle.

• 6000-series extruded aluminum, Mil-Spec Type III Class 2 hard black anodized
• 7075 aluminum barrel nut, Type III Class 2 hard anodized
• 17-4PH cored stainless steel rail mounting attachment (patented)
• ARCA Swiss profile integrated at the 6 o'clock position
• M-LOK slots at the 1, 3, 6, 9, and 11 o'clock positions
• Free floating, shim-free installation
• Times to the upper receiver to prevent twisting
• 20.0 oz total weight, including mounting hardware and barrel nut
• Made and assembled in the USA

The enhanced rail shape gives a more stable shooting surface than a typical round handguard when shooting off a bag or rest, and the integrated ARCA profile means you don't need a separate ARCA plate to run a compatible tripod or bipod. Installation requires no barrel nut shims, and the mounting system times to the upper receiver to prevent twisting under recoil. At 17 inches, this is the longest HDM ARCA option, suited to longer-barrel precision builds where maximum accuracy from a rest or barricade is the priority.

Cross Machine Tool builds precision-machined AR-15 components for shooters who need their rail to maintain zero, backing every rail with US-made construction and a veteran-owned commitment to quality control.