I just signed up for an Appleseed Pistoleer one day event. I own a Mark III and Mark III 22/45. Since the 22/45 is one pound lighter than the regular Mark III, i will let my GF use that one. I want her to enjoy the event, so I've ordered a Tandemkross firing pin, extractor, bushing, and Halo charging ring. I want to improve the 22/45s performance. I get the parts next Friday. Will let you know what i think. This order started off with just the Halo charging ring (which i would never order for myself) to make it easier to charge the bolt for a 250 round day of shooting.

 

Received my Tandemkross parts yesterday. Installed. The 22/45 was easier to get all parts installed on. The ejector replacements gave me some trouble with both. The MK III mag safety disconnect removal turned into a Youtube marathon as I punched the retaining pin all the way out and scrambled the loose parts (fun stuff). All back together. I haven't shot either yet. I do like that the magazines eject with force instead of how they used to have to get pulled out of the magwell.

 

I bought a MK3 a few years back for $300.
Had a horrible trigger on it and needed a prybar to get the mag out.

Bought the TK 6-pac upgrade kit and found a youtube install vid with a 12 year old girl installing it!
I figured: fair enough, if she has can do it . . .
Easy install but pulled out the tall mag release. (left handed - stuck out too far)
Mag now flies out and other upgrades were good.
That left the gawd-awful trigger - got the Volquartsen trigger and sear.
Amazing difference!
After tossing that $150 at it I got Firesights and had the barrel threaded.
Oh, and a red dot.
Spent way too much on it but boy-howdy is it fun!
It is a bit nose heavy with the can, though.