Mil-Spec Receiver Extension Buffer Tube Lock Ring (Castle Nut) for AR15
Ground Zero Precision's Mil-Spec AR15 receiver extension buffer tube lock ring (castle nut) is the perfect standard part for your AR15. Its solid construction and clean matte black finish make it a great looking replacement, build project or spare part and we offer it at a great value for an essential item. If you need the parts to keep your AR in top shape, look no further than Ground Zero Precision!
» Black phosphate finish
» Gun quality tool steel construction
» Manufactured and coated in the U. S. to exact Military specifications