Sight mount enabling inverted mounting of firearm sighting device

Abstract

A sight mount base having longitudinally spaced base sections defines an intermediate space or recess within which the downwardly facing Horus reticle adjustment knob of an inverted optical sighting device is received. The sight mount base may have independent, spaced base sections, each being releasably mounted to the accessory mount rail of the firearm or may be a unitary base structure machined to define an intermediate recess or receptacle within which the Horus reticle adjustment knob is received. The spaced base sections may be interconnected by a structural bridge so that the sight mount base is in the form of an integral structure. Inverted positioning of the optical sighting device eliminates the presence of upwardly projecting obstructions.

1 . A firearm sight mount permitting inverted positioning of a firearm sighting device having a reticle adjustment knob and a windage reticle adjustment knob on a firearm having an upper portion, comprising:
 a sight mount base having a first base section and a second base section disposed in longitudinally spaced relation and defining a receptacle therebetween, said sight mount base being mounted to the upper portion of the firearm; and   sight ring assemblies projecting upwardly from each of said first and second base sections and supporting a cylindrical portion of an inverted optical sighting device with a reticle adjustment knob projecting downwardly and positioned within said receptacle and in closely spaced relation above said upper portion of said firearm.   
     
     
         2 . The firearm sight mount mechanism of  claim 1 , comprising:
 said upper portion of said firearm being an accessory mount rail having upwardly facing spaced lands and grooves and defining clamping surfaces; and   lever actuated clamp mechanisms being mounted to each of said first and second mount base sections and releasably clamping said first and second mount sections to said clamping surfaces of said accessory mount rail.   
     
     
         3 . The firearm sight mount mechanism of  claim 1 , comprising:
 an accessory mount rail being disposed in fixed relation with said firearm and defining said upper portion of said firearm; and   said sight ring assemblies supporting said cylindrical portion of said inverted sighting device with a reticle adjustment knob positioned in closely spaced relation with said accessory mount rail and being free for manual rotation for reticle adjustment.   
     
     
         4 . The firearm sight mount mechanism of  claim 1 , comprising:
 said sight ring assemblies each being defined by substantially horizontally split ring sections; and   fastener members securing said substantially horizontally split ring sections in gripping assembly with said cylindrical portion of the inverted sighting device.   
     
     
         5 . The firearm sight mount mechanism of  claim 1 , comprising:
 said first and second base sections being independent base structures positioned in longitudinally spaced relation and defining said receptacle therebetween.   
     
     
         6 . The firearm sight mount mechanism of  claim 1 , comprising:
 said first and second base sections being positioned in longitudinally spaced relation and being interconnected by a structural bridge member that is positioned to define said receptacle between said first and second base sections.   
     
     
         7 . A firearm sight mount permitting inverted positioning of a firearm sighting device having a reticle adjustment knobs on a firearm having an upper portion defining an accessory mount rail having spaced lands and grooves and having clamping surfaces, comprising:
 a sight mount base having a first base section and a second base section disposed in longitudinally spaced relation and defining a receptacle therebetween, said sight mount base being mounted to the accessory mount rail;   at least one lever actuated clamp mechanism being mounted to said mount base and having releasable clamping relation with said accessory mount rail; and   sight mount ring assemblies projecting upwardly from each of said first and second base sections and supporting a cylindrical portion of an inverted optical sighting device with a reticle adjustment knob of the optical sighting device projecting downwardly and positioned within said receptacle and being disposed in closely spaced relation above said accessory mount rail.   
     
     
         8 . The firearm sight mount mechanism of  claim 7 , comprising:
 said sight ring assemblies each being defined by substantially horizontally split ring sections; and   fastener members securing said substantially horizontally split ring sections in gripping assembly with said cylindrical portion of the inverted sighting device.   
     
     
         9 . The firearm sight mount mechanism of  claim 1 , comprising:
 said first and second base sections each being independent base structures positioned in longitudinally spaced relation and defining said receptacle therebetween; and   a lever actuated clamp mechanism being mounted to each of said first and second base sections.   
     
     
         10 . The firearm sight mount mechanism of  claim 7 , comprising:
 said first and second base sections being positioned in longitudinally spaced relation and being interconnected by a structural bridge member that is positioned to define said receptacle between said first and second base sections.