The adjustment could also be decided and corrected as follows: (a) With the breechblock in the closed position, are the firing pin cocked, measure the distance from the entrance. https://student-cute-th.com/%e0%b8%a3%e0%b8%b9%e0%b8%9b%e0%b8%99%e0%b8%b1%e0%b8%81%e0%b8%a8%e0%b8%b6%e0%b8%81%e0%b8%a9%e0%b8%b2/