I have bit of time at the moment. Might as well.
these are just based on either the little I know or the ones Ive personally handled.
KNS Pins: definitely not needed. You might want to sell those to get money for other parts.
Eotech 552: not sure if this is something you had on hand but I would have gone the XPS route. Longer battery life + lighter from what Ive observed on a friend’s carbine.
RRA trigger: Ive never tried it, or handled it on anyone elses weapon but If looking for a good “upgrade” from the standard GI trigger, I would look into one of Geissele Automatics’ triggers.
Midwest rail: im not sure about the gen II stuff but one of my friends has their gen I carbine rail on his govt profile 11.5 + FSB, without any optics and it weighs heavier than my 16middy with a DD RIS II mk18 and larue stealth upper…
Don’t forget about the CH, another good one. So now we have MOE Grip, VLTOR CH & Black finish. Now all you need to add is a BCM Upper, BCM Lower and BCM BCG then you have a awesome rifle.