Hello again everyone, been a while since I was on last and I come bearing questions (lucky you) regarding one of my side projects. I would like to find some way to make a new "screw cap?" for my spare mag. This pistol is a CO2 KWC and I understand that support and replacement aren't words associated with this company but I was able to find a piece of threaded pipe that fits with the threads in the magazine so I thought I would give it a try. Before I go on, I want to make sure everyone is on the same page with my terminology and what I am referring to. http://img-cdn.redwolfairsoft.com/upload/review/184/UZI-3.jpg http://fubarbundy.co.uk/wp-content/uploads/2015/08/image98.jpg Still not sure if that is the actual name for the part or not, but that is what I mean by screw cap. Back to business, after purchasing that pipe piece it donned on me that if it takes standard 12 gram co2 bulbs like it does, then the size of the cap shouldn't vary from one brand to another. So I looked into other similar parts and came up with a few. Now I lack the hands on experience with CO2 mags and multiple brands so I am hoping that you can give me an opinion on if they might work, and if they don't work, then why? http://www.ebay.com/itm/Universal-C...soft-Pistol-Magazines-Clips-NEW-/332000697340 Claims to be universal, aside from the height of the cap I would think it could work. http://www.redwolfairsoft.com/redwolf/airsoft/ReviewDetail?reviewID=184 Maybe Marui can lend a hand? Also have a green gas conversion cap available for that model as well. Which leads me to my next option. http://www.torontoairsoft.com/KWC-Gas-Valve-Adapter-for-UZI-and-SW40F_p_3563.html Straight from KWC so I would expect the best match up here, but of course no CO2 with that cap. As long as it holds enough gas for all 25 shots I am fine with it. Other than threads matching up I can't see too much problem in dimensions so what do you guys think? Is it worth it to do this? I am open to other suggestions if none of these work. All this is in hopes that I won't have to buy a $35 mag before shipping and still be missing a cap for one of them anyway. Thanks for any help you provide.