Dimpled barrel to ensure proper gas block alignment. Pistol length gas tube. 0.750 gas block. M4 feed ramp

• Length: 7.50"
• Model: AR9
• Twist: 1:7"

*Item must be returned in unused condition and in the original manufacturer's packaging (if applicable). If an item arrives non-defective and accurate to its description, this guarantee does not apply and returns will not be organized in those situations. Please confirm compatibility and specifications with us regarding item Lead & Steel Llc AR9 5.56NATO Government before purchasing if you are unsure.