adamjudge6

Hi all, I’m going to be building a DMR/SPR/Reece Rifle from an m4 base. I have a polarstar f2 engine to install in whatever body it is I buy, what brand metal receivers often give the best alignment whilst still being good quality without skimping out. has anyone put the f2 into a g&p vltor receiver, how would it fit, are they good quality etc (picture below) thanks adam