WHAT DOES AMT BACKUP MEAN?

Good enough to help keep messing with and it last but not least dawned on me the slide was dragging on my thumb and finger. Modified my grip a bit and it works each and every time. I've way better pistols but That is just exciting to shoot Now and again. Had a Jennings 22 and it absolutely was full garbage and threw it away.After you put a 380 ACP