Quickdraw, Stock and Grip for me. The Grip is the only one that is iffy, some people notice a difference and some don't when using it.
I mostly notice the effect of grip on the full-auto ARs with the longer range shots. That's where you'll notice the slight center speed increase. Up closer, it doesn't make a noticeable difference. --- What would happen if I hired two private investigators to follow each other?
If you want a suppressed AR, the Scar is hands-down the best candidate.
It's not really a great attachment on most guns in this game, but the Scar, SMR & Mk48 all use it really well. --- Signatures that consist of quotes are bizarre- you could falsify a quote and no one would know.-Jesus
Silencer is definately a good choice probably the only AR i would put it on. it has good range anyway so its barely effected. Plus your fire rate is slow so you don't want to be giving your position away and get rushed by SMGers.