attention Mossberg 930 owners

[gunsarefun]

First pic my 930 and my new 590 that I just brought home today.

Second pic, piston in the barrel cylinder. If yours is really dirty, it's going to come out of the cylinder very tight.

3rd: Piston itself

4th: back of piston with retaining ring

5: rear retaining ring, piston ring, piston.

If your 930 is dirty, you will find a LOAD of carbon built up in the grooves of where the rings seat in on the piston. That built up gunk pushes the piston ring up against the cylinder wall, the dirtier, the tighter. Once you have cleared all of it out, the piston ring will spin freely on the piston and the piston assembly will glide in and out of the barrel cylinder.

[Lu(ky]

First pic my 930 and my new 590 that I just brought home today.

Second pic, piston in the barrel cylinder. If yours is really dirty, it's going to come out of the cylinder very tight.

3rd: Piston itself

4th: back of piston with retaining ring

5: rear retaining ring, piston ring, piston.

If your 930 is dirty, you will find a LOAD of carbon built up in the grooves of where the rings seat in on the piston. That built up gunk pushes the piston ring up against the cylinder wall, the dirtier, the tighter. Once you have cleared all of it out, the piston ring will spin freely on the piston and the piston assembly will glide in and out of the barrel cylinder.

Are those pieces made out of plastic? I just bought my 930 SPX yesterday and shot in while in DROS so I have not taken it apart yet etc..
The reason why I ask if it is plastic I would think gun scrubber would be to harsh on the plastic? Going to take a look at it when I get it on the 31st.

Also has anyone use FROG LUBE on there shotguns? It works great on my handguns?

[SOMIS 13]

has anyone takin the piece oposit end of the gas piston that seems to be threaded into the barrels gas port out? if you look at it it seems to be threaded in and some kind of coiled ring is in there. it seems to me that piece could use a good scrapeing as well, i just dont know if it requires a special tool for re assembly or not. and also the ring in that end scratches my magazine tube everytine i reassemble mine after cleaning.

[CasperSYTFU]

Yes I did and it was a PITA to reassemble that end.
You don't need to remove it at all. Just brush it with a brass/copper brush.
Leave that end assembled. (Details in my own build journal)