Upgrades I I have on my slabside are:
1. Marvel or Clark trigger - Marvel is a pain to set up compared to ones with exposed overtravel screw like Clark but I like it because it is adjustable for trigger reach. I have a Clark on another. Lack of serration on marvel is not an issue for me. In fact, when shooting, I do not noticed the lack of serration.
2. VQ sear - greatly decrease trigger pull.
3. VQ Hammer - maybe... Original hammer maybe good enough.
4. Grip - maybe - depends on what you want. I have the finger groove wood grips + skateboard tape. Helps with the steep MKII grip angle.
5. VQ rear sight - maybe if you have extra cash to burn.
- On both of my MKIIs, I have reduced the hammer/sear engagement just a hair to reduce creep (not gritty but it can be felt during slow trigger pull). One is very crisp, breaks like glass, no noticeable creep - approx 3.5lbs. Other still has very little smooth creep and only noticeable when pulling trigger very slow but pull weight is light (less than 3.5lbs pull).