the AUG is one of those guns that your accuracy won't get worse when you suppress it and thus i always use a suppressor on it. i would check out symthic.com and look at what each gun lacks and try to base your attachments of negating them. a stubby/potato would probably be best with both as neither have a high first shot recoil or recoil up. a compensator might be best with a PDW to negate side to side recoil.

two things i always use on every gun is the Kobra RDS and Laser Sight. you don't lose your reticle as bad as others in the sun. as far as the laser goes just get used to turning it on and off when you feel its necessary.