What the fins looks like makes minimal difference. Key is the diameter should be very close so it seal properly. For a valve that looks like this: That can be replaced by a valve that looks like this: Says there is very little in the design that makes the difference. The key is actually the spring and the weight of the valve. On a big EU forum (Arnies) there is a Russian guy who replicated a Ice Pick Valve with the stock one by essentially drilling holes and filing away material in the stock valve from a TM to lighten the valve and he put in a lighter spring. Worked just as well as the Ice pick valve... I do believe the valves are here. I have two boxes of unopened Airsoft that got in last night.