I have shot both forms . The only issue with the Colt mag pcc is reloads . I have to hit the bottom of the mag to make sure it is seated and locked in place. Also the Colt mags are top fed when u drop one for a reload it will shoot out some of the rounds left in the mag . Both my Colt mag and glock mag pcc run reliably. The glock pcc is faster to reload . Just stick with factory glock mags . Taran base pads and MBX base pads are good to go with.
I had H&M black nitride 2 handguns the finish is beautiful and hard and durable . Had to modify one of the parts tried with a hand file it didn't do anything, used a bench grinder to get thru the finish. I say it is pretty durable.
If and when components start to come back . There will still be issues do to shooters looking to stock up for the next shortage. At least for now I don't see it getting any better.
At the least I would recommend a VQ extractor and a VQ sear . The extractor is self explanatory . The sear will improve your trigger pull and break at a minimal cost .
I use Rock River Arms mags in my pcc the mags have a metal follower and slick finish . I would look at your magazine springs also check your follower see if it's damaged.
The RO who gave the Make ready dropped the ball . Before he allowed the shooter to leave the shooting box he should have followed procedure and issued and unload and show clear . And holster . The RO running the shooter is in charge of the shooter .