Compact German prism battle sight. Schott HD glass and an etched illuminated reticle are clear and bright. Better eye relief than an ACOG, though heavier. Illuminated dot in the center of the reticle is similar to the Elcan Specter.
This is the military model (different from the M332 or T432). Fantastic field of view. Incredibly clear glass - it's German.

Looking to sell for $650 or trade for an ACOG (I'm doing a retro AR build).

Carlisle area.