The GrovTec Alignment Rod is a precision-engineered tool designed for .308/7.62mm barrels crafted from ground and polished O1 tool steel for superior durability and accuracy.GrovTec .308/7.62mm Alignment Rod15" overall length for optimal reachMade from ground and polished O1 tool steelSlides directly into suppressors and barrelsProfessional-grade construction by American manufacturersEssential for hunters American service members and shooting sports competitors who demand reliable precision-made firearms accessories for proper barrel and suppressor alignment.