Trijicon ACOG Compact 2x20mm Green RTR Riflescope

Green reticles read fast against dirt, brush and shadow, which is most of what a carbine gets pointed at. The Compact ACOG puts a green RTR reticle behind fixed two power glass in a housing short enough for rifles that are already crowded with a light, a laser or a folded stock. Dual illumination keeps the reticle visible from full sun into shade without a brightness dial to manage.

The RTR reticle gives aiming references for shots that need a holdover rather than a single aiming point. Trijicon includes the Q-LOC mount, so there is no second order for hardware. Two power is a deliberate choice here: fast enough for a close target, sharp enough to make a hit at the far end of a carbine range.