.22lr

Have a nice collection of .22s semi-auto. modern gun - Ruger Mk4 Hunter (tuned, w/Volquartsen trigger) sometimes has jam (mostly problem to fit). Never had any problem with old guns (Colt Woodsman, Browning). Nor with P226 (convertible Kit). in some reviews on YTube, guys said it is normal for...

A guy learned I enjoyed tinkering with guns and ask me if I could fix his old 22 (he thinks it's a 22mag) pump rifle. He only had the bolt assembly with him, I'm waiting for the make, model and sn picture. The firing pin's broken. What do y'all think it is?