WE-Tech 30 Round Steel Magazine for WE Open Bolt M4 Airsoft Gas Blowback Series Rifles (Version: CO2 / Tan)

"I ordered 5 of these and they're working just fine and dandy for me.

Depending on the person you might like or dislike the weight of these. Definitely not as heavy as LM4 mags. But do hold a bit more to them then a highcap.

As mentioned in other reviews these are Gen 3 and do in fact have the bumps on the back. I swear mine must have been industrial strength because after numerous uses mine still took a really strong hit on the bottom to get them to seat into the mag well properly. Eventually I just filled them down and now they work perfect.

The paint scratches very easily on them so just know a few uses and they look like they've been through Iraq. Take a mallet and smack the bottom lips to securely tighten the base plates.

Nothing major I've had issues with so would definitely get again

"These magazines work great with my M4CQB open bolt. Did have a problem with the magazines not locking the bolt back on empty but found a fix for it. The spring on the mag catch is weaker than the spring on the bolt catch on the rifle so when the last BB is fired, the mag catch cannot push up on the bolt catch. I removed the spring on the bolt catch on the rifle and now the mags lock back 98% of the time, which is a big deal for me. You can also try shimming the unit where the screw attaches to the shell so that the guts sit a hair higher than normal, but havent tried it, but in theory would work.

"Build Quality is pretty good, texture has a slight "grainy" feel to it, but doesn't interfere with mag handling/reloading. Most of the weight is on the top of the magazine, which felt awkward to me at first. I got a little unlucky when i got mine, the base-plate was extremely loose. I lightly tapped the 4 retaining flaps holding it in place, and all is well, the mag had no issues firing before and after tapping. Well there's not much to review on mags, so let's get to the pros and cons

PROS
-Cheap compared to other gas rifle mags at $38, $30 on sale (KWA LM4 mags being $44, GHK M4 mags going for $53).
-Much easier to find than every other brand
-Light weight; slightly heavier than a standard 300rd hi-cap

CONS
-A BIG pain to load without proper speedloader (See WE-Tech 15rd "Strong" BB Speed Loader Tube Set sold here.)
-Paint on magazine body scratches easily, a few mag changes and you can already see the paint wear around the top area of the magazine.
-Only holds 30rds. To my knowledge, the lowest capacity for GBBRs. (Yet the most 'milsim' out there.)

* Final Notes -Please be sure to pick up the speedloader if you don't have one yet, check your baseplate if it's loose, and with any gbbr/gbbp or ggb magazine, ALWAYS lubricate your rubber seals and moving parts before testing! *

"I purchased 3 of these magazines for my WE M4 CQB. They work perfect, although I was a little disappointed that they weren't exactly "new" All of them were scratched up quite a bit.

"great magazines. quite durable. however, after about 20-25 rounds, occasionally the magazine valve will stick open and vent untill you eject it. so, just bear that in mind.

"Just get the green gas mag and get black gas for it. When you order this it's a 50/50 wether it will work or not. Both of mine leak, I have to drown the piercing valve in silicone oil in order for the first one to work and I can't find a replacement valve anywhere. The second one I have to take apart and drown the release valve in oil for that one to work. When they work though they work great I just wish I knew where to buy the piercing valve.

Other than that in my WE-Tech gbb scar and I get about 1.5 magazines out of each CO2 cartridge.

Overall I like these CO2 magazines because of how much more power they have, they make the gun kick harder and shoot harder and are pretty simple to do matinence and work on.

I would recommend these mags to people with some pretty deep pockets just to keep these working and to have enough CO2 for them.

"I got a gas blowback m4 variant that takes the mag and it leaks but it seems easy to fix so not to upset

"Slight feeding issues with the WE GBB CQB rifle, every other magazine it will jam, easy to clear but annoying...

"My mags would leak and I couldn't get through a whole mag without running out of Co2 I returned the mag and replaced it with a green gas mag and I have had no problem with those mags

"Out of 6 ordered 3 had slow CO2 leaks no matter how hard to you tighten the screw on the CO2 canisters. The leaks were a constant slow leak you could hear when you put your ear up to it. I tested each of them w 2 co2 canisters each and they still leaked so had to be returned.

So it seems 50% of CO2 mags ordered will have a leak.

"I bought 2 of these mags to try out at an Op, neither Mag would even pierce the CO2 cylinder.

"Okay, you'll definitely want to go with the green gas magazines. I bought two of these and now they're for spare parts. Over half of the time that you put in a co2 it will fly out of the top and drain itself. And if that doesn't happen you'll still barely ever manage to shoot all 30 rounds out. And the green gas NEVER fails, no leaks, and it will last about 60 rounds per fill. So save your co2 for pistol mags and grenades.

"Okay, you'll definitely want to go with the green gas magazines. I bought two of these and now they're for spare parts. Over half of the time that you put in a co2 it will fly out of the top and drain itself. And if that doesn't happen you'll still barely ever manage to shoot all 30 rounds out. And the green gas NEVER fails, no leaks, and it will last about 60 rounds per fill. So save your co2 for pistol mags and grenades.