CYMA Bizon PP-19 Airsoft AEG Magazine for S&T Echo1 Silverback Viktor Genesis (Type: 190 Round Mid-Cap)

"Haven't had problems with them so far. I bought 6 midcaps. They do what they're supposed to do lol
Now for the mag holster/pouch... I use bicycle water bottle cage holsters, they snap in just like a water bottle would and come out easy too but they don't fall from running or jumping. It's pretty much a fast mag holster for the bizon. I used to use the paintball tube pouches but those were too slow.

So yeah, bike water bottle cage holsters.

"I have not used it a whole lot yet but all i can say is i'd rather have 3 of these than 1 of the high caps. they are so much easier to load and there is less chance of breaking. My last hi-cap i had the feeder broke.

I would highly recommend stockpiling with these since it seems impossible to get the s&t ones.

"This Mag is great if you don't abuse it.
It can fit on the S&T PP-19 but you will need to sand down the catch lip on the mag quite a bit for it fit properly

I heard a lot of people say this mag breaks easily, but I believe it's because they are over loading, loading it wrong, and over winding the mag.

- Don't fill the mag up to the max, just fill it half way or less. It causes quite a bit of stress on the mag body and the feeding mech. (Yes, we all want to fill it to the 1000 round cap, but do you honestly need that much?) And it's a spring loaded plunger type like the p90, it's not meant for that kind of stress.

- Don't load the bbs from the tap door. Just twist off the end cap and pour the bbs in. It's so much easier on both you and the mag.

- some people want to wind this thing up till they hear click like the P90 hi caps so it can feed the entire mag. This mag was not meant for that.

If you just treat it properly it will work and quietly feed your PP-19 500 rounds without a problem.