Hi Melv,
Longer description here down a bit;
https://forum.vintageairgunsgallery....l-tips-faqs-2/
But as Micks says really, trigger guard off then just unscrew........you may need to pull the trigger back a bit to clear the cylinder and also do it standing up with the muzzle on a bit of carpet or the like, there is normally not a load of preload on these, but standing gives the best control.
They normally unscrew really easily, as Mick says again, if tight don't force it as the stock is secured to the breech block by a long screw only up the middle of the stock (access bung at rear) and if the stock is not tight you can do damage, so remove the trigger and sear and use something in the slot for leverage, or use a strap wrench on the block etc.
It's also easy to damage the stock bolt cover.......there should be a spring steel plate under it which pops it out once you have removed the two small screws, but often if not distubed these covers can be tiget even so, especially if the wood has swollen or debris / old polish is present.
Best way I have found if this happens is use a slightly bigger pair of screws that bite in the holes just, and a bit of metal with two holes drilled in it to match, and a small slide hammer / pair of grips.
If you try and lever them out it causes damage and you also run the risk of breaking them.
Trigger weight is stamped on the stock underneath, and can't be changed unless a 3 hole block with the rear adjuster pair I recall.......but triggers and sears on two hole blocks on earlier guns respond well to stoning and pivots polished etc. and can be made very crisp.
ATB, ED