Mossberg 590 stiff safety.

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v33

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SW Ontario
Ok, sure push harder...but my new 590 came from the factory with an incredibly stiff safety selector. Much harder to push to fire than to move to safe. I have another 590 (.410) where the safety is smooth and easy to disengage.

I took it apart (security screw was a pain), cleaned and lubed everything up and decided not to tighten the screw back down so much which seemed to actually make the problem worse, tightened it down quite a bit and things are better but nowhere as smooth and easy as my other Mossberg.

Saw a post elsewhere about tightening down the screw that holds the stock to the receiver so I torqued it down some and maybe that helped though I can't quite see why it would make a difference.

Is this just a matter of wearing it in? Could there be a burr in the hole that the ball bearing is supposed to recess in? I didn't think to check that until after it was put back together.

I did notice a bad thread on the screw that holds the switch on to the safety block that might prevent me from tightening it further but it is far enough up near the screw head I don't think it makes a difference. But I don't think sufficient tightness of the screw is the issue.

Any other thoughts? Hate to send a brand new gun out for warranty.
 
Thanks for the reply. Unfortunately the condition still exists even with the entire trigger group removed. Will see how it goes over time.
 
They probably overtighten the screw on your safety button from factory, i would suggest to remove the factory screw, clean the plate under the button and lightly grease, then reinstall with custom screw i made on cnc, these screw mount flush to the button and are way easier to screw/unscrew than the original one. When screwing it back, you can adjust the strenght required to move the button back and forth. Tight it as you wish and use blue locktight on thread and it wont come out (Dont go too loose or your safety will engage by itself from recoil) Good luck!
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Thanks, I did try to loosen and it didn't seem to help much but can make another attempt. I will also source a machine screw with a hex head if I can find the appropriate size or try an entire aftermarket safety switch.

Much appreciated.
 
I will take a look next time I get it apart. I assume you mean the place where the bearing rests on the spring or should I be looking at something else?

I have ordered an S&J safety so I will be back into it shortly.
 
I would guess that theres a burr somewhere, maybe on the slot edges where the screw shank travel, thread inside the grey block could be misaligned, i would suggest to disassemble and check every single peace one at a time. Start with the block, check if you can move it freely inside the slot, without spring check with your finger if the button does move freely, check under the button, check the plate under the button for any burr, if all that passes the test, i would bet the screw thread in a misaligned block.
 
v33 said:
I will take a look next time I get it apart. I assume you mean the place where the bearing rests on the spring or should I be looking at something else?

I have ordered an S&J safety so I will be back into it shortly.
Click to expand...

Yeah, that's what I'm thinking. Just a rough edge or machining or something.
 
The S&J jumbo safety improved the feel of the action. Very smooth and even effort from safe to fire. I am sure the additional leverage helps but it's obviously a much higher quality piece than the factory plastic one with the metal shim underneath. Added their no-jam follower while I was at it.
 
I'm assuming you have a steel 590A1 safety and not the plastic safety.

If you use a round a polishing stone (not a grinding stone) in your dremel, you can safely "break" the edges of the ball bearing divots in the underside of the button. alternately, rob the sheet metal piece off the underside of a plastic mossberg 500 safety and install it between the machined steel 590A1 plate and the receiver. Either fix will smooth it up a lot.
 
I had the same problem on my 590 Shockwave.

It was so tight I thought it was broken. To get it to move, I had to cover the safety with a rag and then used a flat screwdriver to push the safety towards the fire position.

I repeated this action probably a hundred times and finally, it is now moving normally.
 
Same thing happened to my 590A1. I tried upgrading the safety to an oversized S&J but that only made it worse.
The safety and trigger group hasn't worked since and the gun has been turned into a paperweight as a result.
 
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