ORIGINAL: liquidorange
i cant wait till monday to make a call to mossberg so i will ask if any know the answer. i have a model 500 that the fore arm ejects back on its own and spits out the shell every time i shoot. i have known 2 other people that have had similar problems with the 500 but never asked what the problem was. they just put them in the shop. is this a broken pin or slide or something? the gun worked great before so im hoping its something i could fix on my own thanks!
COULD be the gun, could be the way you're holding the forend! Quite a few people will PARTIALLY OPEN a slide action rifle or shotgun every ttime it recoils, a sort of reflex reaction!