I found these in my father's closet! He got them both from a port in Italy in the mid-80's. The short one is a Seac. The longer one is undefined. It has feature of easy handle detachment. You push forward the white safety (on top) and turn the barrel to release it (something broken there). It also has a power regulator on the muzzle, and a sheath for strapping it on the leg. We used to dry fire them at an olive tre e. I thought you pneumatic maniacs might like them!