Why did you replace the sear and extractor?
I first heard about the recall from Davidson's, a distributor I deal with. My sales person told me that Ruger requested that they (Davidson's) pull all Ruger Mark IV pistols from availability and put sales on hold. I posted on another forum that something is going on with the Ruger Mark IV guns.
The picture of the one above is my personal pistol. The Ruger extractor on the Mark IV is the same, stamped steel type extractor that's been used since they first introduced the Ruger Standard in 1949. The business end of that stamped extractor does not capture the rim of a .22 cartridge case firmly enough to my liking and will let go of a spent case during extraction, which will cause "stove pipes" of spent cases. The factory Ruger extractor has some very bad roll-over burrs from the stamping die on the bottom of the extractor. Those burrs collect crud and that will impede the extractor from going through it's proper arc during the extraction process. So, I replace the extractor with a much better extractor, that I stock here, and has a much better profile that captures the case rim more positively. There is a reason the there are at least SIX aftermarket suppliers of extractors for the Ruger Mark pistol and 10/22. They use the same extractor, and I've tried each makers extractor and settled on the one that I've found works the best.
The sear was replaced with a Volquartsen Target sear that has a slightly sharper face angle and provides a trigger pull weight between 2½ & 3 pounds........safely.
My pistol doesn't do what the recall claims, as far as the safety is concerned, so, if I'm just after another magazine, I'll pull one from stock and continue to shoot this gun until the safety, if it ever does, screws up and then I'll contact Ruger. BTW, I've had 7 other, Ruger Mark IV's cross my bench and only 3 of those 7 had the safety issue, as described in the recall, malfunction when the safety was put in the "middle position". When all the safeties were put into either the "ON" of "OFF" position, the safety held just fine. All & of those customers were advised of the recall Ruger has on these pistols. It's up to them concerning what they want to do, but they've been made aware of the recall.
