EMG Lancer Systems Licensed L5AWM 30 Round Magazine for CGS & MWS Gas Blowback Airsoft Rifles (Color: Train-Safe Blue / 300 Blackout)

"Left 4 of these mags in an unsuitable environment for more than 4 months, and they don't have a single leak. Maybe I was just lucky but the 4 mags that I have are very nice. They can get through at least a whole magazine with one gas fill, and sometimes two magazines depending on the temperature outside.

"Works great so far. Also works on the Double Eagle version.

"Honestly amazing mags - to see how they work in a double eagle MWD GBBR check out my YouTube - The Real Deal Airsoft

These mags make the guns recoil much stronger than stock mag out the box

"used with MTR-16
it's a really tight fit so i suggest sanding down the top half and just keep playing with them. no gas leaks and you'll get about 40 rounds before a magazine runs out of gas