Good quality - JE Machine Tech AR-15/AR10 Mil-Spec 6-Position Buffer Tube

received buffer tube and visual was a high quality item, installed the buffer tube with no issues. When I was test firing the gun though, I noticed issues. The area where the spring retainer pin is located had longer cut outs on the sides where the pin comes through the buffer tube, which the bolt would hit when firing. I dissassembled and took the tube one full turn out, which barely caught the spring pin at this point and problem was solved. Matched the black on Aero receiver.