
As you can see on the picture, there is a "STOP BUTTON" or "PIN" (or whatever else you would like to call it…) that you need to press "IN" (with a screw driver for example…) to turn the gas regulator.

You might want to take the gas regulator out completely if you want to see how the system works – do not worry – you will not break anything!!! (it is only a problem if you loose the gas regulator itself!!!
You will see that position 2 will have the gas channel fully opened and in position 1 the channel will be "almost" closed... The amount of gas released in position 2 will be a lot higher than in position 1.
You may try setting the gas regulator in position 1 and fire some light loads – if it cycles normally without jamming – you can leave it on 1 forever!
There is no way to tell weather it will cycle right or not – it depends on the gun itself, or actually on the diameter of the holes that IZHMASH has drilled in the barrel… Well, just try it!!! (As you can see, my S-12 on the right is always set to 1 as it cycles perfectly with both types of loads in this position… The one on the left sometimes jams the shell on the way out if I shoot bird-shot in position 1 so I change it depending on the type of ammo I use...)
Warning!!!
What you definitely DO NOT WANT TO DO is set it to position 2 and fire magnum loads (or slugs)!!!
Surly, you can fire slugs in position 2!!! No problem at all, just a little more recoil it seems!!!
The shells will definitely eject properly! After you fire about 20-50 rounds like that (even "low recoil" slugs) try to disassemble your gun – you will get the top cover off ok, but you will not be able to take the spring out because while you fired those rounds the slide hammered the hell out of the rear trunnion block! It will look like someone literally took the hammer to it!!!
If there is a need for you to fire slugs in position 2 (like in 3-gun-match) I suggest you use the recoil buffer!!!
I STONGLY suggest using the buffer in any case!!! It prolongs the life of your gun!!!

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