What's the hardest gun you ever disassembled?

[StingyGunner]

The rifle was an Remington Nylon 66. I believe it is the Apache Black model. Anyway it was down in the basement for years. I guess the tenant [A lady from Florida] put it there and forgot about it. Anyway it was very rusty. So much so when you would pull the bolt back it wouldn't go forward on it's on. I took it home and cleaned it and it functions fine now, but man was it a pain.

I've been tinkering with guns since I was 18 and this is by far the most pain in the ass gun I ever worked on. I mean when they designed this they had to stop a few times and say "Wait, there has to be a way to make this more complicated". It took three to four hours for me to reassemble it. I'll take a Colt apart again before I work on another Nylon 66.

I did tell my Uncle not to do anything more then wipe it down. If any rust develops on the inside to bring it back.

So what's the hardest gun you ever took apart?

Yes!!! I was just about to go type this. Last time I took it apart was years ago. I completely disassembled it, hosed the stock out (yes, garden hose), cleaned it very well, and reassembled. Needless to say, I haven't shot it since. I've got a 10/22 on my short list.

[Noah_Zark]

Remington Nylon 66 and Remington Model 51 pistol.

The Ruger Mk 1 and Mk 2 are hard only the first time if you don't have a secret decoder ring.

Noah

[bogey1]

My ruger mk 22/45 F- that hunk of crap. I will never break that piece of shit down EVAR....
Its one bad ass shootin gun though...

[imashooter2]

Not really difficult, but a PITA... the AMT Backup.

[ar15jules]

Glock 19. It was horrible. I still have nightmares.

Really? Glocks are by far the EASIEST!
Jules

[ar15jules]

The most difficult firearm I ever reassembled was an AR 15. (LET ME EXPLAIN) At the armorer's course, all 18 students had to COMPLETELY take there rifles apart and the instructor threw ALL of the parts into a really big cardboard box. Upon returning to lunch, we were told, get into the box and build a rifle. Sorting through the box looking for specific springs and roll pins was a pain in the ass for sure.
Jules

[jim_s]

same as some of the other folks.

Ruger MKIII 22/45

[100-10x]

I had a difficult time with the Ruger 10/22.

[762xIan]

Just about anything Ruger that is a semi-auto.

First time I did a detail strip and cleaning on my Ruger P-9 carbine was a real pain in the ass (pre-youtube and online info days)....they make good stuff, just not something I would want to have to carry in the field and do maintenance on for sure.

I did a complete teardown and refinish of an old pump Hi-Standard shotgun that was a little difficult with the lift gate and little levers and pins in the action that had to be put back just right.

Nowadays it is pretty easy with digital cameras to document what you are doing.

[Zeeba]

Unless parts are rusted, frozen, or otherwise broken, disassembly of just about anything is pretty easy. The ulcers come into play when you try to put it back together.
How much more evolution is it going to take for us to develop three hands so we can properly assemble a Ruger Mk pistol or a Remington 522?