Sig P226 Problem.

[blooregard]

Thanks for the help folks.
Think this is the issue as the wider spring inside the cylinder was twisted as it could be seen through the square aperture on top of the cylinder. The other spring must be the return spring to pull the cylinder back which had come free but no idea where it goes. Found the schematics online but really cannot make any sense of it.

OK,

stripped down my SIG which is an original model that is about 5 years old, hopefully not too much has changed.

> Have a look at this pic <

I've removed the blowback cylinder from the slide. There is only a single spring in my gun which I have put the red box around, when installed the spring mates up with the surface in the slide indicated by the red line. This is under tension when the slide cycles and the piston moves back in the cylinder, once the spring pressure overcomes the effect of the residual chamber pressure it resets the cylinder back to its original position. The slide then moves forward to colect the next BB.

The other spring is inside the cylinder (not much point in try to photgraph this as I cannot remove it!), and this sits in the transfer port (the tube between cylinder and breach) and keeps the plastic "probe\plunger thingy" (that sits inside the transer port and extends into the blowback cylinder) pushed back slightly to stop it selaing the cylinder. I think that the role this plays is that it sits open and pushes against a BB in the breach. When the gun is fired the probe will try to move forward but the BB keeps it in place long enough for some gas to be released to fire the shot. Once the BB is gone the probe moves forward and seals the blowback cylinder to cycle the action.

So, there are 2 springs, the really thin one used to return the cylinder to its original position, and the one inside the cylinder that controls the gas flow until the BB is shot. The one inside the cylinder should not be visible unless you look down the transfer port.

Hope this helps, at least with locating where the 2 springs should be located.

[ranger02]

the main issue with this type of pistol is while being fun they wear out i have had a few of them my present one has been striped and improvements to the problem areas. so far its ok but if you need replacement parts they are hard to come by and buying a non working one for spares is pointless as its likely to have the same faults

[Duckbay]

Okay again thanks to all especially Blooregard for thepic. Sig all back together and just fired off some bbs. First one out the slide but the rest were fine. Reloaded the mag and out of 12 just 2 came out the slide so seems like very fine tolerance somewhere. Will look at the guide to the barrel as the carrier might be the issue with wear.
Cheers
Alasdair.

[Duckbay]

Just a quick update on this as it may be of use to somebody in the future. When I put the Sig back together it was still popping a BB out the ejection slide about once every ten shots. Everything was working as it should and the guide seemed fine. Then I noticed there was a tiny gap between the plate holding the cylinder on so tightened the screws again and found when I thought it was tight there was still about a half turn to bed it down fully. With the blowback it had been moving the cylinder slightly and misaligning the guide.
So thanks to all for the help once again.
Cheers.