Saw it but he replaced the entire lower half and the friggin bolt carrier group too...just the complete barrel,charging handle and upper receiver were tested. Disappointed , should have been a stock complete one shot in semi IMHO
Well, he just said the 'carrier', not the whole group. He may have put the M&P bolt in the M16 carrier. I hear what you are saying though. It doesn't really test the gun as a whole, mostly just the barrel. They could have used a slidefire stock to do this. Obviously it wouldn't mean sustained rapid fire but it would certianly test the stock components considering the stock lower and bolt carrier are not capable of actual automatic fire.