I was merely asking if anyone else had knowledge of Ruger having a period of poor quality control.
Specifically the mid nineties, when the P90 was produced.
I've long been a Ruger owner and enthusiast. I've owned a fair number of different Blackhawk's, SBH, Redhawk, Security/Service/Speed-Sixes, Standard & MkII .22's, SP101DAO ... and a KP90DC (stainless P90 with spring-loaded decocker). My father gave me a couple of my first ones at the end of the 60's, and in the early 70's, and I started buying my own in the early 70's.
I've had to either return for repair (or repair) my fair share of Ruger handguns over the years, but I'd not think of any specific time period as being one noteworthy of being called a "poor QC period".
FWIW, my KP90DC was bought when the model was first new, and it had to be returned to Ruger fairly quickly. Weird galling problem on the pick-up rail of the slide, which resulted in rolled metal building up from hammer contact. Turned out they had to replace the slide for what they explained was a heat-treat problem.
I used that P90 a lot, doing a lot of shooting. Over the years I've replaced a few parts on it (extractor, mag catch, guide rod, firing pin, off the top of my head) as they either became worn or broken. One time when I was on the phone to the Prescott plant, ordering some parts, one of the guys asked me how much I'd fired that P90. When I told him, he chuckled and said that maybe it was time to retire it and buy a new one, as I'd probably gotten my money's worth out of it. (The model was still in production at that time.)
I still own that well-worn KP90DC, and it's been a fine .45 for something that only cost me a little over $300 when brand new. Reliable, reasonably accurate, rugged & durable. I don't often use it much anymore, owning 8 other pistols chambered in .45 ACP, including 5 assorted 1911's, but I wish Ruger still made that clunky, aluminum-framed single stack P-Series .45 pistol. It was a real workhorse. Value for the money.
I preferred the original 7-rd mags, myself, versus the later 8-rd mags (using the folding leaf spring design and shorter mag spring), although I did like how the later production mag bodies incorporated a small indentation in the side of each mag lip (to help prevent round displacement when hotter recoiling rounds were being used, mostly meaning +P loads).
The sights and trigger were acceptable for their time and the role of the P90, but I imagine that if the gun were still in production at least the sights would've been improved.