Quoted:
I am going to get an 8" barrett rec7 upper in 6.8, i was told that the thread pitch of the barrel is 1/2x28

I do plan on putting a QD suppressor ready muzzle brake/ flash hider on it. but i dont know what to get and from where

right now i am thinking the surefire muzzle brakes and suppressors, but they are 5/8-24 thread. and they are the only people i found who sell 6.8 suppressors, but then again i only looked at AAC and surefire

QUESTIONS:
which would be better for a 8" 6.8 piston system, a muzzle brake, or a flash hider, i heard that muzzle brakes work better for the suppressors since it doesn't shoot all the gas into the chamber, im not a suppressor expert so its just what i heard

and depending on that what suppressor should i get for the 6.8, as i said i only seen surefire with the 6.8 one

lastly, im trying to think of what optic to put, i been thinking the eotech 516.

Products i been looking at.
Surefire side,
Muzzle brake
Suppressor

And if i go the AAC side,
Muzzle brake

Suppresor ???

and any other options if u guys got any input, as i said, my main struggle is the suppressor and whatever QD adapter i put since im new to those.