CP Reg. and Macro-line

[Curtless VS3]

I'm going to be upgrading my vs3 soon with this set-up

CP Micro Razor Drop Forward
CP on/off ASA
CP long no gage port reg.
CP reg adapter.. till i get the trinity front block
Warrior clamping feedneck, blue
Lapco BigShot barrel
Blue body kit.
and eventually trinity sick body. by that time ill pretty much have two vs3's

I have a blue Low-Blow bolt from ACP but i hear the shock-tech one is better?
I also have the striker from ACP but i dont know if its any better.
but whats the difference between micro-line and macro-line, is one for LP and the other for HP?

[DFSniper]

micro line is a lot smaller and used for cocker LPRs and a few other guns.