(Read this on another board, thought it should be posted here if anyone is experiencing FTF in their new Mossy pump shotgun. It's a documented issue so contact Mossberg if this is the case. Post is from 2013, so it may have been fixed by now. If anyone has this issue, post about it.)
Based on several complaints, including myself, it seems there may be a QC issue relating to Mossberg's Cartridge Stopper which is causing a specific operation failure - Failure To Feed (FTF) from the magazine tube upon racking the slide.
ISSUE IS A FOLLOWS:
Seems the Cartridge Stopper is bent too far during production.
CAUSATION OF ISSUE:
Because the Cartridge Stopper is bent too far the action slide rod is going behind the Cartridge Stopper instead of infront of it. It MUST go infront of it in order to cause the shell to eject from the magazine tube.
CORRECTION OF ISSUE:
Take the Cartridge Stopper out of the receiver and bend it in the opposite direction in an effort to make it straighter. This will take some effort so dont be afraid to put some gradual and consistent pressure.
Place the Cartridge Stopper back into the receiver and try and cycle dummy rounds until you get consistent ejection results.
Repeat this step as many times as necessary.
IF LEFT UNCORRECTED:
You will wear down the Cartridge Stopper and the Action Slide Rod which will cause you to replace both items at a cost of approximately $60.
See my post for examples of excessive wear at the 400 round mark:
Based on several complaints, including myself, it seems there may be a QC issue relating to Mossberg's Cartridge Stopper which is causing a specific operation failure - Failure To Feed (FTF) from the magazine tube upon racking the slide.
ISSUE IS A FOLLOWS:
Seems the Cartridge Stopper is bent too far during production.
CAUSATION OF ISSUE:
Because the Cartridge Stopper is bent too far the action slide rod is going behind the Cartridge Stopper instead of infront of it. It MUST go infront of it in order to cause the shell to eject from the magazine tube.
CORRECTION OF ISSUE:
Take the Cartridge Stopper out of the receiver and bend it in the opposite direction in an effort to make it straighter. This will take some effort so dont be afraid to put some gradual and consistent pressure.
Place the Cartridge Stopper back into the receiver and try and cycle dummy rounds until you get consistent ejection results.
Repeat this step as many times as necessary.
IF LEFT UNCORRECTED:
You will wear down the Cartridge Stopper and the Action Slide Rod which will cause you to replace both items at a cost of approximately $60.
See my post for examples of excessive wear at the 400 round mark:
