I owned a Ruger Mk. II long enough for two range trips, and then sold it; the strip/reassembly process is way too frustrating.
An hour and four youtube videos wasn't enough to get it back together without use of a hammer.
This may sound snarky, but really isn't meant to be...
If you need a hammer to reassemble a Ruger Mark pistol, you have done two things wrong. The second thing was whatever you did wrong that you used a hammer to "fix".
The first thing you did wrong was,
you took it apart!!!
There are guns in this world, lots of them, CIVILIAN guns, sporting guns, guns never designed for military or police use that simply should not be disassembled until/unless they fail.
I put the Ruger .22 autos in that group. I've had a Ruger Mk I target since the early 80s (actually, its my wife's gun, but she almost never uses it). That gun has been disassembled exactly twice during that entire period. Once, by a much younger and dumber self, in the early 80s.
The second time happened about a decade ago, when my idiot son in law asked to borrow it for a bit. Wife said ok, and specifically told him, "DON'T TAKE IT APART!"
I told him, don't take it apart. After a couple of months, I asked my daughter about it, and when would it be coming back home. She, made excuses, and wouldn't give a firm date. Not at all like her usual self.
By the time 6 months had gone by, and each time I asked about the gun, an excuse was given, my much shamed daughter returned all the pieces of the pistol in a grocery bag, with very sincere apologies.
Yes, he took it apart, and couldn't get it back together. I rather expect it, but my wife was pi...unhappy. She remembered when I did it, and I had a difficult time getting it back together, something that made an impression on her, because I was a small arms repairman in the army, and am fairly skilled with firearms mechanisms.
Which was why she specifically told him not to take it apart.
My daughter has since divorced....
I have my Grandfather's Ithaca shotgun. It's 107 years old, and has never been disassembled more than the intended amount, removing the forend and barrels. It still functions flawlessly.
Guns designed for military use are made to withstand the military mania for disassembly, cleaning, and reassembly. Many sporting guns are not. Some are, but many are not. Those guns can be kept clean and running, in perfect condition without taking them apart under normal circumstances.
If you and your firearm take a dunking in the creek, that's different, but other than something like that, there's simply no need to take them apart, if they aren't designed for that.
Now, if it IS something designed to stand it, like an M1, AR, AK, SKS, 1911, etc, then buddy, detail strip it and play to your heart's content. I do. Just remember that some things are better left alone, absent vital need.
Next year.....