Details: 45 Degree Mount, by Vortex. Model 45RDM.
Vortex’s Description: “Use this 45 degree offset Picatinny mount in conjunction with a red dot sight, laser, flashlight, sling, or open sights. Lightweight and durable machined aluminum construction. Mounts to any 1913 Mil-Spec rail.”
RKB Armory Opinion: “The offset red dot sight is a great option for an LPVO. This is a simple, inexpensive option.”