KWC SW40F Model Sigma Full Metal 22rd Spare CO2 Airsoft Magazine

"I run the Sigma as my primary for woodland (albeit with heavily modified custom parts) and have bought over five mags for this gun, and all have worked perfectly without fail, they don't come with allen keys to turn the screw cap in the base of the magazine. After some experimenting, I could use a 10mm sized allen key I believe (don't quote me on this), and have been using to this day.
Other guns, like the Jericho 941, came with an allen key as well, and they worked with the Sigma screw caps as well. But, as far as the mags are concerned, it would be cool if replacement screws could be sold, since I, with them being plastic, accidentally stripped the threading on one of them. Or even cooler, if they sold the optional screw that comes with the actual gun that sticks out a bit from the bottom of the mag, but you can turn with your own hand.
But, as far as the mags are concerned, they all work well, made out of metal, and can take a few drops on concrete as well, no need to worry about breaking the feel lips either, as they too are made of metal, only plastic parts are the screw cap and the follower.
The mags hold 24 rounds each, and on a full co2 canister, can get two reliable full mags worth of gas, before the third one starts to slowly dwindle down, before it can barely cycle the gun.
If there are any downsides to these mags, is that after a while, the slide lock on the sigma itself, can eventually scrape the plastic on the magazine follower flat, and won't activate the slide catch, and another, it occasionally leaks, but after dropping a few drops of silicone oil on the co2 tip prior to putting it into the gun, fixes it for me.
So, if you need extra mags for the Sigma don't be afraid to buy one or two (or five like i have) for this gun, these mags to what they need too do, and won't disappoint!

"These mags are great but a little pricey. They work well in my Marines CO2 pistol. They actually hold 24 rounds and one in the chamber. The paint does start to scratch off after use but its mainly in the areas where the mag comes into contact with the mag well. My only complaint is that out of the three I ordered NONE OF THEM CAME WITH AN ALLEN WRENCH which is what was advertised in the description. You'd think if you pay $35 for the thing they will at least give you what they say their going to. _:-( . Other than that they work great and feed well. You can easily take the spring out. Buy em.