Ok, so hand gun, 4-5" barrel range, accurate enough to hit small peasant... Im not 100% sure what you have sitting there. If that is the ruger mark II then id say your set. If not read on.
Ruger Mark II/III
My go to .22 pistol is the ruger mark II or mark III. While the mark III is a great gun, I prefer the mark II as it feels to be a more solid pistol than the mark III. I believe the frame is based off of a luger style pistol. My mark II is quite a reliable piece as well; a friend has a junior browning 1911 and it shoots well about 70% of the time. the barrel is fairly thick so it wont address the weight issue though i have had no real issues carrying it. In my mind it has enough weight to let you know you still have it. Also it is remarkably accurate. It is also reasonable in price brand new id say they are in the 375-400$ range for brand new (not exact i am Canadian after all).
Sig Mosquito
If your into getting what you pay for the SIG is also a nice choice. I dont own one anymore but many of my friends do and i love to shoot theirs (i gave mine to a young lady im raising). Its not as cheap as the mark II but its definitely worth looking at. Of course you could go to a full size frame with a .22lr swap out (P226R). That would be buying two guns for the price of one. and you wouldnt have to get used to new grips when changing pistols. of course theres a lot more advantage to that kind of set up than just grip but your looking at recommendations, not reviews.
a few recommendations:
1. If you can, find a range that 'rents' guns for use in their range. Check to see if they have a few .22s. If they do go shoot them. try them out and see what you like.
2. Find friends with .22s and go shoot theirs.
3. when you do buy one, get several different variations of ammunition and try them all out to see which one your gun likes best. .22lr pistols can be finicky about the ammo they swallow. For a semi it will most likely be a heavier grain (36-40grain bullet) in order to cycle the action.
4. when you find the ammo your pistol likes best go buy as much as you can. Batches can change and so will the results you see.
I hope i have given you at least some nibblets.