Cross Machine Tool UHPR MOD 2 HDX AR-15 Handguard M-LOK

Heavy Duty Xtreme Rails are built for the rigors of daily use. All HDX(TM) series rails feature Nitride Hardened steel QD sockets to withstand daily sling carry. Features: Barrel Nut- 7075 Aluminum Type 3 Class 2 Hard Anodized 17-4PH Cored Stainless Steel Rail mounting attachment- Patent Pending Anti rotate tabs time Rail to upper receiver (2) Nitrided Steel QD sling sockets, 1 on each side/end at the 3 o'clock & 9 o'clock positions No Barrel nut shims required for installation Does not contact or apply side loads to gas tube Inner Diameter of handguard - 1.315" MLOK Slots on all flat sides (7) Includes barrel nut wrench Barrel Nut diameter- 1.378" Compatible with most known low profile gas blocks Made & Assembled in USA