Mossberg Firing Pins
I recently bought a Mossberg ATR in 270 Win. at a large retail chain for what I thought was a bargain. I "googled up" all the info I could and initially thought I had a real winner. However, I started to see a few postings about broken firing pins on the ATR and 4x4 models. I contacted Mossberg customer service to see if this was a frequent or isolated problem. They have yet to reply. Now I'm not a gunsmith, mechanical engineer, or metalurgist. I am a retired USAF maintenance officer and a graduate of USC's Aircraft Mishap Investigation Course. I'm qualified to be the maintenance rep on military aircraft crashes - kind of like "CSI" for smoking holes in the ground when the aircrew isn't capable of saying what went wrong. The NTSB does the same work for civilian crashes. In any event when something goes wrong I want to know why.
As for the broken firing pins: Either a design flaw (over-powerful firing pin spring, too much "play" in the pin and it shearing at the hole in the bolt face, miss alignment, or incorrect pin diameter), manufacturing defect (incorrect heat treatment or composition of the pin), or combination of things may be the cause.
What I would like is for those folks who had a broken firing pin to come forward and give some specific details of what happened or what they did. This may be as simple as installing the the little locking roller pin backwards or a high number of "dry firings". Also, if you got an explanation from Mossberg, please share it. -AimHigh