Check out Ironsighter Co, PO box 85070, Westland, MI 48185. They make a see through scope mount that attaches to the left side of the receiver by the two screws that are already there. No gunsmithing required to attach it.
there a a few things you can do you can mount it on the side it takes some getting used too but it works or you can get a special scope made for mounting farther forward there hard to find but they work great
Yes
Yes
There are 2 grooves cut into the top of the receiver to except matching bases and rings to mount a scope on top of your .22 caliber rifle.
50's or so
Yes
Yes
100-450 or so
Best left to a good gunsmith.
There are numberous ones. The only limitation is your bank account.
Your Winchester model 25 rifle will take any size scope that you see fit to use as long as the rifle is drilled and tapped for scope use.If your rifle comes with a 3/8in.milled receiver rail then you must use that size scope ring bases.I recommend that a good 4X power scope is all that is needed for the effective range of .22cal rimfire ammo.
the rifle has a dovetail mount for a scope built into the design.