This is a North American Arms Single Action known as the Black Widow chambered in 22 LR, model NAA-BWC.
Their Black Widow and Mini-Master Mini-Revolvers evolved from their popular .22 Magnum frame series and include the time tested design characteristics that are incorporated in all NAA Mini-Revolvers. The result is enhanced stability and accuracy for the shooter. Both the Black Widow and the Mini-Master have a Heavy Vent Barrel" a Bull Cylinder" Oversized Black Rubber Grips and come with either Adjustable Marble Arms Sights for elevation or Fixed Low Profile Sights" also by Marble Arms. 5-Shot capacity.
Features:
Stainless finish
Marble Arms fixed sights
.22 LR conversion cylinder
Heavy vent barrel
Bull cylinder
Rubber grips
Safety cylinder