I’ll give my anecdotal experience with Ruger.
I’ve owned give or take about 10 Ruger revolvers over the last 20 years. Of those 10, I’ve sent 3 in for RMA work.
One was a brand new SP101 I bought sight unseen. It would have the action freeze up if you began a double action pull, staged the trigger, and then released without firing. They replaced the pawl and some other parts. Returned it to me within 2 weeks. Worked fine after that.
One was a brand new New Model Blackhawk 357/9mm convertible also bought sight unseen. The barrel was not aligned properly with the frame, causing sighting issues. Moreover, the loading gate would sometimes pop open during recoil (moderate strength rounds, nothing crazy). They clocked the barrel and replaced some parts for the loading gate. Returned it to me within 2 weeks. Worked fine after that.
The third one was a brand new New Vaquero in 45 Colt - also bought sight unseen. I bought it in 2018. Over time, I realized that it would always shoot about an inch and a half to the right, and it wasn’t me. Upon closer examination, I realized that the front sight blade was not installed properly centered to the radius of the barrel. They clocked the barrel for me, and even though the sight doesn’t look straight, I’m now shooting on center. Works fine. That repair was done 2 years after I had bought the gun.
The moral of the story is this. Ruger definitely has QC oversights. But I have absolutely no reservations about buying a new Ruger sight unseen, as I have complete confidence that they will take care of their customers after the fact.
Heck, I actually prefer buying my Rugers sight unseen from retail vendors online, simply because I don’t have to worry about handling marks and lack of oil from guns sitting in retail stores for customers to mess with before someone comes along and buys them. I was at a gun store today and was appalled by the way that they had brand new revolvers literally rusting on the display stands from neglect.