Mossberg 500 Troubles

[93gtosu]

I recently inherited my great-uncle's (and best hunting buddy RIP), Mossberg 500 12 GA. I'd like to take it out a few times this season but I'm having some troubles:

1) I can not get the forearm/bolt to "lock-up" in the forward/fire position unless I really slam it forward. If I do not slam action closed and I stand the gun on end...the action will open on its own.

2) Looking down the sights: the barrel is rotated counter-clockwise a few degrees. Enough to notice and move the bead sights.

3) Stock has a hairline crack at the receiver. Does anyone have any experience with the Boyd's Plainsman stocks? Any pics?

I gave her a pretty good cleaning and got a lot of junk out of it. I inspected the areas where the barrel mates with the receiver and they look clean, no burrs, dents, etc.

The only thing I can think of right now is the magazine tube bent or twisted? How would I be able to tell? What would be the fix?

Thanks in advance!

 

[mnrivrat]

1) Stock

Ebay auction has listings of take off stocks for a very reasonable price .

2.) Lock up

The lock up problem is usualy dirt built up on the bolt release lever channel near where you push on the release button to unlock. Dirt in the channel sometimes does not allow the lever to completely return home which prevents the forward tip of the locking lever from raising far enough upward to seat behind the bolt carrier. (lock up position)
If no dirt, then something in that system needs adjustment or replacement.

3.) Barrel rotation

The front of the ejector has a protrusion that sits in the notch of the barrel extension. If this protrusion is broken off it will allow the barrel to rotate. If not broken, once again either the barrel extention notch or the front of the ejector needs adjustment or replacement.