Unless Mossberg has recently changed the design(possible,due to some fairly catastrophic bolt assembly failures with the original design)there really isn't anything external that holds the pin in.The rear of the bolt body is splined,then the bolt handle is press fit onto the body.The firing pin,from what I can see in the pics includes an integral lug that travels back and forth in a slot within the bolt handle.(Best seen in pic 3)constable6 said:I have a 100 ATR in .270, Last night I removed the rifle from my gun cabinet and teh bolt fell out. It appears there is nothing holding the firing pin assembly in the bolt. Not sure if someone has been in the cabinet or not (grrr) but I need to know if there is some special part that holds the firing pin assembly in the bolt assembly. If not, how do I order a complete new bolt assembly. I love this rifle and I need if functioning again!
jsgiunta said:I was ready to pull the trigger on a 30.06 100 ATR, until I read about the bolt design. I can't believe that after the injuries and the lawsuit, Mossberg still hasn't changed this design. Those pictures of the bolt handle separation are scary. It should have been a simple fix to either spline the inside as well, or pin or braze the handle to the bolt. However, from what I've read, the real design flaw seems to be the fact that the weapon will still fire if the bolt is not completely locked up. This bolt system, I'm told, seems to be the same failed Raptor design, which Mossberg took over. If this is true, and they still haven't addressed these issues, I don't think I want to own one of these weapons.