Galloper gun

from The Collaborative International Dictionary of English v.0.48
Galloper \Gal"lop*er\, n.
   1. One who, or that which, gallops.
      [1913 Webster]

   2. (Mil.) A carriage on which very small guns were formerly
      mounted, the gun resting on the shafts, without a limber.
      --Farrow.
      [1913 Webster]

   {Galloper gun}, a light gun, supported on a galloper, --
      formerly attached to British infantry regiments.
      [1913 Webster]
    

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