This is an Optic mount for 34mm and 30mm (with included adapter) tubes. Good for a lot of red-dots. The design uses the rail section for the downward force to hold the optic along with the attachment force for the mount it's self. The fasteners are gears themselves so no safety wire is needed on that side. They are sized to be tapped with 10-32. Designed with Laser Sintered 6Al4V as the material, with stainless 10-32 cross bolts.

http://brainlubeonline.com/scopemount.html