Bayonet connection: 1/4" quick connect female connector. for&nfor for BSP;for ’s adapters are designed for ’s K2 K3 K4 K5 K6 K7 pistols, not for K1700 K1700 cubes, K1800, K1900, and K2000. Suitable model: for&nfor for BSP;for K2 K3 K4 K5 K6 K7 series.
eBay