Cross Machine Tool UHPR MOD 4 HDX Rail 7" 9" 12.5" 15"

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: Rail- 6000 series extruded Aluminum Milspec Type 3 Class 2 Hard Black anodized 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 each 4140PH Alloy steel Nitride finished QD sling sockets inserts, 2 on each side No Barrel nut shims required for installation Does not contact or apply side loads to gas tube Inner Diameter of handguard: 1.315" Machine engraved T markings (not laser marked) will show up after paint. Includes barrel nut wrench Barrel Nut diameter: 1.378" Compatible with most known low profile gas blocks Overall rail dimensions: 1.96" wide x 2.195" height Length: 7" 9" 12.5" 15" Total weight including mounting hardware and barrel nut: 7": 8.7 oz 9": 9.7 oz 12.5": 11.7 oz 15":13 oz Made & As