Advanced Technology Ar-15, Adv A5101020 Ar15 Castle Nut

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.

Finish: Black
Type: Castle Nut
Model: AR-15
Size: Mil-Spec
Material: Steel