Sig Sauer TANGO Riflescopes are divided into two main categories: TANGO6 scopes feature a 6X zoom ratio, and TANGO4 with a 4X zoom ratio.
- At the moment, only the TANGO6 line features second focal plane scopes, and both the TANGO4 and TANGO6 line feature many first focal plane riflescopes.
- TANGO6 scopes feature Sig's HDX Glass, while TANGO4 do not. All TANGO4 have a 30mm standard main tube, and the TANGO6 has a 30mm main tube on all models except the 5-30x56mm which has a 34mm tube.
- Both models feature models with illuminated reticles and adjustments in MOA and mrad.