I used to have a gun smith across the street. It was handy. I took a hack saw to a 28"barrel last year and cut it to 22". ground it flat on grinding wheel.Took a small round file and smoothed out the crown. Then I smoothed it a little more inside and out on a wire wheel. It looked so cool I just had to go shoot it. Walked off 50steps and turned and shot 3 off hand shots with no sights. Too my delight they were 3" apart. I repaeted this a few times. It was and old barrel and the fore arm screw lug broke off but it was fun while it lasted. Total cheap redneck modifications but it worked.