My son and I are constantly trying to learn about guns and how to make them better. In the past year, we have each built our own AR-15. There is something about building your own rifle that is so enjoyable and satisfying. Recently a friend of ours wanted us to look at his Bushmaster AR-15 because he was having problems with it. The rifle would jam on every other shot. After examining the rifle, the first thing we noticed was that the gun had the incorrect buffer tube in it. The second thing we observed was that the trigger was horrible. After consulting with another gun guy we know, Tyler then installed the proper buffer tube. He also installed a better trigger assembly. Here is a video which was shot today showing you how nicely the rifle is working. No jams!!!!!!