This is a North American Arms Single Action known as the Mini Revolver chambered in 22 LR, model NAA-22LRR.
The NAA .22 Long Rifle is the most popular Mini-Revolver ever produced. With the many current accessories" it is versatile for many applications and is the standard by which other Mini-Revolvers are judged.
Features:
Stainless finish
Red/black wood grips
Half-moon fixed sights
Hammer safety slots on cylinder