"Standing in my own shoes I can criticize the Japs for the changes they wrought in the Mauser firing pin mechanism, but if I happened to be one of the 'experts' who developed the action of our own M1903 modification of the Mauser, I would keep awfully quiet about the whole thing. Because compared to the ill-conceived ignition system of our own bolt action, which was designed with no regard whatsoever for the basic principle of firearms design which demands a firm, crisp blow on the primer, the Japanese modification is a dream of perfection. When our own experts chopped the sturdy one-piece Mauser firing pin in two, and then coupled the two poor dismembered parts together for operation with an inherently ill-functioning joint, they succeeded in accomplishing at one stroke of the drawing pen a point of extreme unreliability for the Springfield rifle, and they also made certain that there was at least one part of their rifle that would break with great regularity, causing the target shot to have to fire many alibi runs on the rifle range—and making the soldier do God knows what on the battlefield. The United States and the Japs alike, in my opinion, would have done well to have adopted the Mauser ignition system as it was."
"The old faults of the M-1903—a frequently-broken firing pin assembly and a delicate front and rear sight—seemed to account for as many stoppages in combat as feeding difficulties did with the M1."
"I know of several instances where the firing pin rod tip broke on a Springfield, rendering the weapon useless or very unreliable. I have also learned what a little jar it takes to bend or loosen the front sight blade."
Excerpts from the book SHOTS FIRED IN ANGER by Lt Col John B. George
CB