Mossberg 5500 Semi Auto Jamming issue

[davie crockett]

I bought a used Mossberg 5500. I paid peanuts for it, the safety mechanism on top was removed when I got it & the slide bolt assembly with a semi hard rack jams towards the back of the frame! The hole on top allows me to tap it all back into closed position, no doubt why it was removed initially! I have did as much research online & learnt nearly nothing. I disassembled it & the buffer block doesn't appear to be damaged in any way. Does anybody have a solution they can share as I am not familiar at all with Mossberg firearms, but I like this as a beater & a challenge!

 

[Lodi]

The hole on top allows me to tap it all back into closed position...

No, don't do that.

You disassembled once, do it again and try to determine where the binding is occurring. forward at the gas system, rearward at the bolt assembly etc etc.

Damaged Bolt Lock or Bolt Lock Pin, Safety Lock or other safety parts floating around the action, hammer binding or loose shot in the works are all things I'd check. The usual clean and lube.

 

[davie crockett]

No, don't do that.

You disassembled once, do it again and try to determine where the binding is occurring. forward at the gas system, rearward at the bolt assembly etc etc.

Damaged Bolt Lock or Bolt Lock Pin, Safety Lock or other safety parts floating around the action, hammer binding or loose shot in the works are all things I'd check. The usual clean and lube.

I have it disassembled now, I have a Numrich schematic I study & I turn the receiver housing upside down in my hand & slowly run assembly back & forth simulating proper function, it seems to be running back on the rails to far & the flat bar on the back of the carrier jams into the recess in the buffer block!

 

[gaff]

ask around locally and find another 5500 that works. then compare them to find the problem.

 

[Lodi]

The hole on top allows me to tap it all back into closed position,...

... the carrier jams into the recess in the buffer block!

So it jams moving to the rear now? Is it jamming going forward? Just trying to keep things straight.

 

[Lodi]

Check for a bent Magazine Tube or bent Action Bar Sub Assembly.

 

[davie crockett]

So it jams moving to the rear now? Is it jamming going forward? Just trying to keep things straight.

It jams open towards the stock

 

[davie crockett]

Check for a bent Magazine Tube or bent Action Bar Sub Assembly.

Magazine tube looks fine, sub assembly not sure, i don't know bent from un bent LOL!

 

[Lodi]

It jams open towards the stock

...the back of the carrier jams into the recess in the buffer block!

Maybe the buffer block is worn out.

 

[davie crockett]

Maybe the buffer block is worn out.

That was my first thought, I ordered one on a whim but after disassembly & looking at the old one it looks to have no signs of damage or wear!