Took these pictures out of my P.I. Boot Camp Book. When on Rifle Range, each day following firing we cleaned rifles at a rack like this. When cleaning op-rod piston no type of abrasive was allowed, just had to keep rubing with a patch and some bore cleaner. :madsmile:
https://www.milsurps.com/images/impo...fleIssue-1.jpg
https://www.milsurps.com/images/impo...ningrack-1.jpg
