X-Shim Re-Test: Rock River Arms AR-15 Accuracy with FMJ and BTHP Ammunition

in my last video I tested the X-Shim which is a product that takes up the gap between the upper and lower receivers on an ar-15 getting rid of that rattle and wobble that you get especially as a rifle ages mostly I wanted to see if the X-Shim would help increase the precision of […]