I've been using this adapter for a while now on my We Baby Hi Capa 3.8 (wave) magazines (25 and 50 rounds) and have had no trouble filling them so far. It makes a good seal on the valve and does not leak at all. Also comes with silicone oil. The only complaint I have deals with the instructions for the silicone. If you put the amount of drops stated into the nozzle, you will experience gas spray while shooting. That is to say when you fire, you will see and feel a mist of propane spray on and above your hand a little. The same thing happened with my brother's Baby Hi Capa 3.8 when he switched to propane. That is not to say that this item is not great, it's just you may need to put more silicone in the cap of the propane tank than is stated.
Comes with replacement tip
Comes with Silicone
Cap to protect nozzle
Plastic makes good seal on magazine valve
Instructions may be too conservative on silicone requirement
Rating: [5 of 5 Stars!]