“I’m not military but a competition shooter using straight-pull AR15’s in National matches. Our guns ore not gas operated so don’t get so dirty but the Breech Tool is great for getting into the hard to reach places in an AR receiver, especially the lugs on the barrel extension. Conventional bristle brushes get destroyed very quickly but the BreechTool gets right in the hard to reach corners with the angled brush heads and a patch on the end. Excellent piece of kit and just as useful in .22 semi-auto rifle and LBP receivers which are notoriously difficult to keep clean. It really gets in there. Thoroughly recommended.”