Use a Phillips screw driver to unscrew the two recoil pad screws and remove the recoil pad. With the recoil pad removed, you'll see a hole that goes through the length of the stock. To remove the butt stock, you'll need a socket wrench with extensions long enough to go through most of the length of the stock. I believe it's a half inch hex bolt. Unscrew the bolt that mounts the stock, and it's off.
The pistol grip should come with a bolt to attach it, probably a socket head cap screw.
Best left to a gunsmith
50-500
No
no colt made the 1902 pistol
$1,000,000,000,000
Does not exist. Winchester never made a pistol in 30/30
One is a rifle round, the other is a pistol round.
To the best of my knowledge, the Winchester company never made a production pistol. The New Haven Arms Company which was formed to continue production of the Volcanic pistol, designed by Horace Smith and Daniel Wesson, produced by Volcanic Repeating Arms Company was eventually bought out by Oliver Winchester and that company became Winchester Repeating Arms. Winchester went on to produce rifles and shotguns, but no pistols. About 700 of the small frame, .31 caliber Volcanic pistols were produced. If you have one of those, have it professionally appraised. In addition, there are numerous books on Winchester history that will discuss this pistol.
50- 300 uSD
No
100-500 or so
I would look at the Colt Defender. it's under $50