I made a 1013 about 10 months ago and have shot perhaps 500 rds through it. I found that the sanded down buffers didn't last long so I shortened that area of the slide that contacts the frame by a tenth of an inch so that a full buffer could be installed. Worked great and offered a flatter surface for the buffer. Still had to reshape that area of the slide to fit the shape of the buffer. Slide locks back, the buffer last and the dust cover still covers that area of the slide. My son will make a 1013 2/15/15 when he returns from Alaska.