The Osprey Global MRS Compact Reflex Red-Dot Sight mounts to any optics-ready firearm that has the RMSc footprint or directly on optics-ready handguns such as the Springfield Hellcat OSP, Canik Elite TP9 SC, Ruger Max-9, Walther and many others, as well as AR-platform rifles. It features a convenient top-loading battery compartment, so there is no need to remove the optic to change the battery. It is equipped with a 2 MOA red dot with eight brightness settings and has added mounting options that makes it adaptable to a Weaver or Picatinny rail. MSRP: $159.95. Contact: www.ospreyscopes.com