I'm waiting to find if I got my order in for the 40X USMC marked barreled action with trigger.Great starter for plinker, trainer, expensive toy, sons gift some time. I remember some builds that were posted, building into a repeater. Who had luck doing it, what other parts were needed, is it too stupid of an idea for GAP to build, AAICS or Mac stock?. You know, the usual questions. Any info response appreciated. Jeff.