Picatinny red dot mount | Holosun 509T footprint Glock 17 Frame-rail mount – installs on

Frame-rail mount – installs on the lower accessory rail under the barrel

The Sightmark Ultra Shot R-Spec is a reflex red dot sight from Sightmark

Window size – 22

Aluminium red dot mount for the standard (non-cut) Ruger Blackhawk

Picatinny red dot mount | Holosun 509T footprint Glock 17 Frame-rail mount – installs onAluminium Picatinny red dot mount, compatible with any red dot sight built to the Holosun 509T footprint whatever the optic's brand. It clamps onto any Weaver or Picatinny rail and holds the optic over the bore. The full red dot compatibility list is below. Holosun 509T footprint accepts any red dot built to this footprint, not just a single brand Weaver Picatinny fit clamps onto any standard Weaver or Picatinny rail CNC machined aluminium rigid,