This is a triple-capped 357 Magnum firing cartridge (6 rounds) made by C-Tec, a company that manufactures and sells custom parts that pursue realism in model guns and air guns and has attracted many toy gun fans.
[Product details]
Quantity: 6 rounds, 357 Magnum models from various manufacturers, including Kokusai, Tanaka, HWS, Marushin, etc.
The .357 Magnum cartridge can be used with the M19, Python, King Cobra, Smythson, etc. ( Metal models and MGC products cannot be used because the cylinder is too short.)
It can hold up to four 7mm cap shots, allowing you to enjoy a powerful sound and muzzle flash.
It comes with a spring that can be used as a blank firing cart (remove the spring if using as a firing cart).
It can be shot in single, double, or triple CAP.
The precursor to the C-Tec revolver cart!
*The price in the image is for the old package.