I have a MkII, so no magazine safety to contend with, but disassembly has never really been an issue for me.
Still, you can use CLP and a boresnake to do a perfectly acceptable cursory cleaning in way less than 3 minutes without really disassembling the thing at all.
She died of cancer.
Contact Ruger immediately and let them know about this. Not cleaning guns can lead to a lot worse than the slide sticking. If a bullet gets fouled in the barrel, the next shot you fire could be the last one you do on that range.
If they are unable to maintain the gun, they should send it back or otherwise dispose of it. You should find a better gun range with staff who have a clue about what the hell they are doing.
Threaten legal action because nothing happened? That sounds reasonable.
What dangerous malfunction do you expect of a dirty .22?
To be honest, I’m more concerned about the dirty (or worn, or damaged; if you never clean the weapon, you’ll likely never notice that either) 9mm or .45, if the shop has a practice of not maintaining their weapons. As far as how much damage can be done by firing a .22 into a blocked barrel, I’ve never tried it.
Holy crap! I’ve shot one of these before and was really impressed. Since then, I’ve always wanted one. Not now… 
That’s what I thought too.
Maybe badly maintained guns give you cancer?
And I’m calling BS on the gun range guy too. That sounds like a recipe for disaster. At the very least the response to “They just tell us to shoot them until they break” should have been “Here. It’s broken.”
It would almost certainly cause my underwear to soil.
I feel the need to defend myself as being a “whiner”. I have great fun with my Mk III as well, and I use it weekly in my pistol league. But it is a bear to dis/re assemble. Not so much because of the complexity - I had a Mk I before buying the Mk III, and apart from the continuous mag insertions/removals, it’s identical. But the Mk III is pretty damn tight, and even after 30 or so disassembly/reassembly cycles, I’m still using a plastic mallet to remove the mainspring housing, separate the grip from the receiver, realign the grip to the receiver, and reinsert the mainspring housing. It’s a giant pain, and I can easily see someone getting lazy and not doing it.
If the bolt wasn’t closing, the issue wasn’t a dirty barrel - it sounds like the bolt & the inside of the receiver needed to be cleaned & lubed, which isn’t really possible without removing them.
Another disassembly question. Back when I sold guns 25 years ago, we were always told and told our customers that dry firing a 22 is particularly hard on it due to the nature of a rimfire firing pin. From the video, the Mark III requires that the gun be dry fired for disassembly. Is dry firing not hard on it or is it poor design?
Sorry - posting fail. I could have sworn I posted that in that “Women aren’t funny” thread. When I looked back in that thread I didn’t see it, so I figured it I must not have posted after all. I didn’t think to check what other threads I might have open.
The sad part is, it’s not even a funny mistake.
The Ruger Mk I/II/III have a pin in the receiver that prevents the firing pin from striking the face of the chamber if you dry fire. The instructions warn quite explicitly that if you reassemble without the pin, you can ruin the gun. I don’t dry fire mine except when disassembling though.
Another issue to think about is that 22 caliber pistols can be finiky about their ammuntion. My Ruger does not want to feed Remington Golden Bullets at all. I had constant failure to feeds in the one box I bought. With Winchester rounds I generally have a failure to fire once or twice a visit to the range, probably 200-300 rounds. Federal and CCI are perfect through my gun. From reading online I see other people have had to use trail and error to see what round their gun prefers. On the other hand I have not generally heard complaints about CCI. Another thought is that I have read that the Mark series pistols have tight tolerances in the chamber. I dont have any micrometer or a way to confirm personally. If the rounds were a little out of spec or what not it is not inconcievable that the Browning would be more forgiving in the loading.
As for cleaning it sucks the first rew times, but you get used to it.
On all of my Mk IIIs. I have replaced the magazine disconnect parts with a custom bushing. Not only does it aid in dis/reassembly, the magazines drop free from the gun as Og and Bill Ruger intended.
Google Sam Lam if you’d like one too. Nice guy in Tronna. Ten bucks and you’ve got mags flying everywhere!
I own a Mk. II and while it is a pain to take apart, I have to say it’s not really possible to re-assemble it ‘dangerously’. It only goes back together one way.
Actually, it kinda is if you remember that one of Radner’s characters was famous for getting things completely wrong and then saying “nevermind!” 
No, that was shortly before I made that post. I did not purchase any ammo for weapons I probably don’t have that night. I just did a quick [del]science[/del] google search to see what .22 ammo costs these days.
Sure, I didn’t mean to imply that the range’s gun could be fixed with that treatment. It’s certainly not necessary to break a Mk down after every range session though.