Has anyone owned or used both of these?  How do you they compare as a general purpose, own-only-one optic?  I like the variable magnification on the sn-4, but the acog has BAC and i imagine the military uses more acogs for a reason, although that might just be price.  i've also read that the picture from the sn-4 is much clearer.

Thanks.

SN4 does not have BAC capable lit reticle... its dim and runs out of batteries in only 12 hours or less at full power.  Its very, very heavy.

ACOG has BAC but that means different POA/POI  for the BAC use (no where near as precise as a red dot) and the reticle goes out when used indoors in the dark with a flash light (makes it veryslow to use in that situation).

Neither is ideal for a dual purpose CQB/Midrange optic but both are better than a fixed non illuminated 4X scope.  Neither holds a candle to a true 1X red dot style optic in close.  Both are excellent at longer ranges.

If you want a do everything optic set up your only choices at the moment are the S&B short dot and the Aimpoint + 3X setup.  New things are coming but thats all there is for now.

thank you all very much for the advice.  that's very helpful.