I ordered a 16" ASA kit. Was accurate as hell, but usually wouldn't fire more than 2 or 3 rounds without jamming. The chamber was undersized (worn out reamer was used), and the barrel was screwed in too far, so the rear sight was adjusted all the way to the right in order for the sights to be on. There have been people on this site who have gotten guns from them with under/oversized gas ports, and gas ports that were drilled too deep. All in all mine was a piece of $hit. I had it looked at by the local gunsmith (class 3 and knows his stuff) and he said it would work if I put a new barrel on it (would be the easiest way to go). I put it on Gunbroker (entire kit) for $275 and didn't get a single bid. Sold it to a buddy for $250 who is going to put a new barrel on it (after he realized that it really wasn't going to work, I told him!). I then ordered a JT kit. The finish matched perfect (ASA finish was nowhere close), it was just as accurate, everything lined up the way it was supposed to, and it actually funtions. OH, and when you contact ASA, best case they don't return your calls, worst case (as people on this site will attest) you will get cussed/screamed at. ASA's components are good, but the assembaly is just plain crap. You might get one that works, but more than likely will not. Spend your money with Bushmaster, Oly, Armatlite, or Colt if you can afford it, or if you decide to build, you can't go wrong with JT. JT has EXCELLENT customer service; if you have any kind of problem, they will help you solve it. I would rather shoot a slingshot than another ASA