Yes, it will sometimes hang up on reassembly. I found that these rifles do work best when cleaned, and they are not the easiest .22 to strip and reassemble. When I was running my shop, I did notice that firing pin breakage did occur. Also, on some the trigger frame is synthetic, and the various pivot pins are retained by having splined ends. Disassemble and reassemble too often and the pins would work loose. In addition, the safety is steel, and the heel of the trigger that it blocks is aluminum. Wear can result in the safety becoming uncertain. Most of the rifles I worked on were used hard and given minimal care.