Pros:

- Gun is very aesthetic and perfect in a Zombie Apocalypse, only if you're in Switzerland.
- Gun position is alright, not too far from camera and not too close, just about right.
- Sounds seem to right on par with what the SG551 should sound when fired.
- World model very detailed.

Cons:

- Animations are okay, but noticed when magazine is reloaded, the thumb goes inside the magazine.
- I think there should be a better flashlight model, cause it looks generic and very cylindrical. Would be nice to see either a maglite or those military-spec flashlight.

Conclusion:

- Very good replacement for m16 for those who like European rifles a lot more
- Some upotte!! fans will want to try this mod out cause of the character, Sig.
- Some room for improvement, but nothing too major.