I sold guns when the AMT Back Up was in its hayday. They never worked reliably ! I tried to stear my customers away form purchasing them. However, most of my customers demanded them because they were the smallest .45 acp on the market. It seems that the current procuction is no better. One TFL poster purchased one and was having a good gunsmith work it over; sadly, he never reposted the results.
Clifford L. Hughes