Heavy Duty Xtreme Rails are built for the rigors of daily use. All HDX™ 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 & Assembled in USA