Advanced Technology A5101020 AR-15 Castle Nut AR-15 Mil-Spec Steel Black
Due to the unprecedented volume of firearms and ammunition sales, there could be a discrepancy between the displayed on-hand quantities for an item vs. the on-hand quantities available from our warehouse. Also these quantities do not reflect the inventory at our physical retail location.
This steel AR-15 castle nut is virtually indestructible and works with commercial, military, and hybrid buffer tubes. It fits most AR-15s and AR variants, but it is not compatible with 308 rifles.