This revolver is single action, and 100% Legal for California.
Ruger GP100 double-action revolvers are among the most comfortable shooting .357 Magnum revolvers. Their rugged, medium-sized frame and cushioned grip system permit repeated firings of powerful .357 Magnum cartridges with minimal shooter fatigue. Because the GP100 also accepts the less-expensive, lighter-recoiling .38 Special cartridges, it is both economical and pleasant for practice at the range. Easy on the hand and budget, all GP100 revolvers boast solid steel sidewalls (no side-plates), and frame widths that are increased with extra steel in critical areas that support the barrel, making them rugged, reliable, and dependable. This model has a 4. blued barrel, a recoil-reducing, rubber Hogue Monogrip, and fixed front and adjustable rear sights.