Ok so here's a take down guide with loadsa pictures.
...This might actually be the most photo heavy post there's ever been on the forums.
Anyway, you'll want to start off by taking the scope and its mounting bracket off, just makes it that bit easier to manoeuvre:
Then you flip the rifle over and undo the two screws on the bottom, allowing you to separate the barrel, bolt and trigger assembly from the stock:
The two screws are here:
Note that the longer one goes by the trigger:
Once they're out you can lift the barrel up and separate the two parts of the rifle:
So now you're sat with this in front of you:
Next you want to loosen the two screws on the right hand side, you don't need to fully remove them, they just clamp the barrel inside the receiver - if you can call it that on a sniper:
Then, before you pull the barrel out, to prevent any damage coming to the fragile feeding tube, you might want to unfasten it and remove it before sliding the barrel free:
Undo these two screws here:
Then lift the feeding tube out - be sure to empty it of BBs first, I forgot... it holds 25 and they bounced around all over my dining room... Cat went mental.
Now the barrel will slide free of the receiver:
Next, we remove the trigger mechanism in order to get at the bolt assembly, to take the trigger out, remove these four screws:
Then just pull it free - be aware that the parts on the sides can fall off, so you might want to take note of how they're placed in case they do:
Once the trigger is free, you can just slide the bolt assembly out - there is a plastic O-ring that sits around the cylinder at the front end, it holds the barrel in the right place, so don't lose it!
So now you'll have an assortment of bits in front of you, which after some organisation, ought to look something like this:
So that ought to help if anyone's wanting to carry out any work on it at all.
In addition to the take down, I've also taken some better photos of the bolt components and measured them with a tape measure... Not spectacularly accurate, but hopefully it'll help you all direct me to which parts will and won't fit...
Here's the cylinder head:
I'm not sure it comes out in the photos, but it sort of has a conical shape on the inside, I assume that's a staple thing with snipers, but I thought I'd mention it anyway.
Here's the piston:
It feels quite flimsy, it's a very light plastic, has a degree of flex in it. The piston head doesn't seem to be removable either. Is that normal in snipers?
Spring guide - same plastic as the piston:
And one of the whole bolt assembly: