As opposed to the TM parts? Unless things have changed some of the more prone to fail parts of the TM ones (feed nozzle IIRC) are nigh on impossible to source even via Impulse101and the aftermarket/3rd party options nowt to write home about.
And due to TM's rigid belief that the world outside Japan is as real as Westeros are on the tricky side of impossible to acquire.
Explosive Enterprises disagrees with that. I see more boneyard Golden Eagles than TMs. As others have said TM are mainly budget guns in Japan we just paid through the nose for them. But TM does the research and development and the understand the limits of the materials they use. I have owned god knows how many guns over the years. I have always run TM stock, I have had guns wear out from use but I have never had a TM gun catastrophically fail. Whenever I read about someone saying TM are bad they have either badly up graded the gun or use it incorrectly and are wonder why a gas almost double the PSI of the design spec trashed it.
