Kalunga,

If you want a really great scope for a DG rifle, then you really need to look into the Trijicon ACOG. I have both the Trijicon ACOG and Trijicon Reflex sights, and while the Reflex is great in low light conditions at short ranges (no magnification) the ACOG has both fiber optic and tritium illumination. There are different reticles available in different colors so you should be able to find something that suits you. The 6x is a bit large, but the 4x scopes are just right for your application. Put it on a GG&G Accucam QD mount and you have the perfect setup. The USMC is using this out to 600 meters every day on the worlds most dangerous game on 5.56 rifles to great effect. Aimpoints are good also, but as with the reflex sight you need a separate magnifier. If you get an ACOG look for one with the wire lanyards on the adjustment caps. These are all over fleabay and they are much less money than a S&B scope. About the same price as Swarovski. Good Luck.

Semper Fi,
Airedale Marine