I've noticed there are several different "red-dot" sights in battlefield 3:
- KOBRA (RDS)
- PKA-S (Holo)
- Reflex (RDS)
- Holographic (Holo)
and maybe some more, not sure. But all of the above are available for my M416.
Apart from slightly different reticles (eg circle or dot), are there any other differences that actually affects gameplay?