Grizzly-Mag fed 12Ga 18.5" Shotgun issue

The only problem I've had with my 12.5" mag fed action was after I replaced the forend, the action bar got bent inward a bit to far when I was putting the new forend on the tube. It popped out of the grove/track in the receiver and jammed the action when I racked it, I got it all apart and bent the bar arms outward which solved the problem. Only happened when I racked it real hard, otherwise it's been great but that doesn't sound like what you're experiencing. I've done a bunch of polishing and de-burring etc etc, it's smooth as butter now.
 
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Kind of hard to see but the slide is going over the manual release

8ESjXr3.jpg
 
I don't polish any of my guns. I just shoot them. they wear in very quickly
I have started using grease instead of oil on all the wear points. the high temp white grease seems to stay in place and not melt away.
makes for easy cleaning also
End of thread hijack
 
So after reading your original post again and looking at my mag fed grizzly and cycling the action without a mag in I think my previous jamming and your not locking closed might be almost the same issue.

I just cycled the action, bolt locks shut but when I pulled back hard on the forend the action bar tried to jump the manual release lever, the very end of the action bar looked bent inward a hair. I tried it a few times with the same result, I took the forend and action bar off and with some big pliers gently bent the end of the bar. Now it sits tight in the track of the action and it hits the manual release squarely and doesn't try and jump off.

I bet yours is bent and either needs a tweak outward or need to be replaced, either that or the manual release lever need to be touched with a file and squared off a hair so the action bar doesn't deflect and jump past it.

Hope that helps get you on track and running smooth, once the bugs are worked out the mag fed grizzlys are really fun. I've done a lot of tinkering with the aftermarket metal mags and have almost got it to the point that 3" shells feed 100% of the time, 2 3/4 shells always feed. Was nothing a bit of deburring and polishing on my bench wheel couldn't solve.
 
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^
Thanks , I believe you are correct .
Mine is new in the box from the dealer . Haven't heard back from them yet .
I did pull mine apart like you did & it seems to me the action bars are very soft & bend easy .
I wonder if they missed the heat treatment in manufacturing ?
Hope to have response from dealer soon
 
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