While I love my Stoner, it has been giving me fits. I've fielded it 3 times now and it has not worked an entire day yet. The first time, it was DOA so in the boot it went. Second time I brought it out, it worked great at the range... until the piston shattered once I took the field. Third time which was like 2 weeks ago, it rocked for the first half of the day, and then there was a misfeed which caused the piston to lock back. Pretty frustrating... I would boot it from the arsenal if it weren't so sexy...