Mossberg 500a action bars?

[irishpunk]

I have a newer Mossberg 500a that I just recently installed a new Advanced Technology Strikeforce stock. This requierd having to replace the "stock" foregrip with an aftermarket one.

The one that I ordered (and have installed) is 7 3/4. Now it seems to fit fine, the problem is that when I go to "jack" a shell into the chamber it seems to want to stick.

So my question is, should I have gotten the smaller action bar part. There is a distinct difference in the length of the bars (from stock to after market) so my other concern is, are the longer bars being forced too far back, and causing damage.

Thanks for the help in advance.

RGR1/75AR

 

[mnrivrat]

The bars themself should be the same length. The dimensional change is in the tube length on the forward end of the bars.

A possible cause of your sticking is a bent or twisted bar. This can happen when the forearm nut gets loosened or tightened without properly restraining the bars. Take your assembly out and use a flat surface to check for a bent or twisted bar.

If you have a side saddle installed the longer forearm can bind up on the side saddle, so check that also if it applies to your gun.

 

[irishpunk]

Mossberg 500a action bars.

They appear to be straight. The fit and finish seem fine. It just seems to me that maybe the actions bars are to long. When I slide the action the whole way back it gets really tight, and "sticks open". It takes some force to lock the action back forward.


I'm just thinking that with shorter action bars won't go back so far, and therefore not get stuck.

Thanks again in advance.

 

[RandKL]

It just seems to me that maybe the actions bars are to long

As MN said, all the bars are the same length. If you're getting binding, it's the forearm plastic that's the prob, not the bars.

rich

 

[irishpunk]

OK guys thanks. I"ll see what I can do about that. Thanks again all. Any other suggestions would be much appreciated.

 

[wideym]

I've also seen Mossbergs have problems with new forearms installed that either are the wrong type or installed improperly. The best way to check is to inspect the forearm where it may have come in contact with the barrel. Look for rub marks on the forearm.

 

[irishpunk]

Found the problem, RandKL was right. There are some plastic ribs toward the top of the inside of the fore grip. A couple of them toward the rear were rubbing the barrel where it tapers out toward the chamber. A Dremel tool is all it took to grind the ribs down, now it's smooth as butter.

Thanks for the advice, my Mossberg works like a charm!