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Is that a *lever action* single shot ?
It is a Ithaca model 66 Super-Single.
Lever actipn break open shotgun.
They come in 410, gauge 20 gauge and 12 gauge.
I have three 20 gauge and two 410s.
I had a 12 gauge with open sights (rifle sights) for deer hunting and sold it to my brother several years ago.
One of the 20 gauges has a vent-rib on tje barrel.
I LOVE THEM.
I have a bunch of single shot shotguns.
There should be about a dozen of them
i have four Iver Johnson Gun and Bicyle single shot shotguns.
A 410 gauge, a 28 gauge, a 20 gauge and a 12 gauge.
The 12 gauge has a solid rib on the barrel.
When i bought the 12 gauge it was a hell of a buy.
I bought two 12 gauge single shot shotguns for $35.
I kept the Iver Johnson and sold the other one for $30.
I used it exclusivly that year for small game hunting and deer hunting.
I shot a bunch og grouse, rabbits and a butt load of gray squorrel and three whitetail deer with it.
Ithaca makes a model 49, most are single-shot. A few are repeaters. They come in 22lr and 22 magnum.
I have a cpuple of the 22lr single shots
The repeaters are a JAM O MATIC.