I am collecting parts for a build for a AR varmint rifle. I have had several through the years and decided it was time for 1 and wanted to have this 1 built. My question is, their is a bolt carrier group that is nickel boron coated ( I believe this is what it is called ) that i can get for this build on another forum. I am getting a Sun Devil upper and lower for this build that is going to have the side chargeing handle. Can i use this or is their a special bolt carrier group that is used when building these. I would like to send my parts to D-Tech as i have heard nothing but good things about them.