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Here's a normal Colt Trooper Mk.III, with wood grips and a shiny nickel finish.
The Colt Trooper has a lot in common with the fabled Colt Python, a similar lockwork, but more robust and hardened, thus it's not as prone to timing issues. These were intended more as service revolvers than deluxe target revolvers.
These have a reputation for some fragile internal parts, due to some of the early Colt Troopers having them made out of sintered steel, something Colt didn't stick with for long as I've heard.
I take things like that with a grain of salt, because often this can come from old fudd types who also hear about the dreaded 'Metal Injection Molding' manufacturing process, which they're certain is really bad, but somehow can't really explain why, the same with Investment Castings.
In all likelihood, these Colt Trooper revolvers are perfectly fine, I certainly don't hear a lot about them breaking.