This app was mentioned in 6 comments, with an average of 1.83 upvotes
I could have sworn someone made an android game where you could piece by piece take down handguns. all the way down to the trigger spring maybe even. I'll see if i can find the app im thinking of, but if the models are already out there I'm sure someone will be willing to help/sell you some goods.
https://play.google.com/store/apps/details?id=com.nobleempire.GunDisassembly2&hl=en here's the app.
The app on the iTunes app store: https://itunes.apple.com/ne/app/gun-disassembly-2/id436292998?mt=8
Here's an Android version of the app: https://play.google.com/store/apps/details?id=com.nobleempire.GunDisassembly2&hl=en
There's also a version of it that's a Steam game, called World of Guns: Gun Disassembly. But something to note with the Steam version (and the mobile versions might be the same way, but I don't know for sure) is that you either have to pay money to unlock the guns (except for the first one), or you have to go on every day to do the stupid "quiz" thing until you have enough points to buy all the models. (Also you get some points if you get as many achievements as you can on each gun)
There are also certain guns that can only be bought with "credits" which you need to pay money for, OR if you get the top score of the day with a certain gun in one of the "game" modes, you get one credit.
Not really a great model IMO, and for a long time you'll be stuck with very few guns, but if you enjoy doing the same thing over and over in one half of your screen while watching videos in the other half, then it isn't too bad. Or you could just pay money for it.
Here is a link to the mobile app on the play store. It's free, btw. I haven't tried it myself, but it's downloading now.
For everyone's reference:
iTunes: https://itunes.apple.com/us/app/gun-disassembly-2/id436292998?mt=8
Android: https://play.google.com/store/apps/details?id=com.nobleempire.GunDisassembly2&hl=en
This is very interesting. They do have a list of available models on their page, so you know before you buy if it's available. I'll have to keep that in mind. I know how to strip down everything I have, but it might be useful for something you're thinking about buying.
Thanks!
EDIT: Not an advertisement on my part and I'll take the links down if asked. I just know that the first thing I went looking for was a list of models available.
There is an Android version too!