Liberty and Justice feature the industry standard RMR footprint for attachment to reciprocating pistol slides, but that's not all they can do! Use this low profile 1913 MIL STD "Picatinny" mount to attach your Liberty or Justice to shotguns, pistol caliber carbines, AKs, target or hunting pistols-any firearm sporting a Picatinny rail. Every feature that makes Liberty and Justice great on Glocks or Berettas will still be there when you put these super light and compact optics on your favorite long gun. Mfg: Swampfox Optics