The Sig Sauer Romeo5 Gen II Compact is a 1x20mm red dot sight for the modern sporting rifle (MSR / AR-15 platform). It includes an interchangeable mount system - a Picatinny riser for AR absolute co-witness plus a low mount for a lower carbine height. Features: 1x magnification, 20mm objective, parallax-free 2 MOA green dot reticle 12 brightness settings (10 daylight + 2 night-vision compatible) MOTAC motion-activated illumination - wakes on movement, powers down when idle CR2032 battery with long runtime via MOTAC IPX7 waterproof and fog-proof Includes a Picatinny absolute co-witness riser and a low mount A classic AR / MSR red dot - run the riser for absolute co-witness or swap to the low mount for a lower-profile carbine setup.