6mmProShop High Capacity 300 Round HPA Tapped Magazine for WE-Tech Gas Blowback M4 Rifles

"I use a WE M4 SOL (HK416) and it fits tight. No wobble in the magwell. Feeds perfectly. No misfeeds, double feeds, or any issues related to the mag. Makes GBBR's so much more fun. Was easily keeping up and taking out the AEG guys. I got to say HPA and this mag makes a world of deference. I know it takes away from the realism but until that make a gas/CO2 mag more than 30rds, you can't compete with AEG's and Polarstar guns. Just remember, we do this sport to have fun not put yourself through torture...lol. I had a lot of compliments on the kick. Most players thought it was another Polarstar gun and didn't know it was a GBBR until I showed them. I was using a chest rig with a hydration system on the back but could have just ran with a hydration pack along. There's no need for mag pouches except when taking out this mag when off the field. I only used this one mag all day. I just had to fill up after 3 to 4 games. Again, that depends on your playing style. I did remove the trap door and used black electrical tape going vertical across the opening. I could peel the top down a little and load more bb's back in and resealed. Using electrical tape did not impede the loading of this mag back into the magwell. The only Con is that my iron sights became loose from all the vibration this gun can do with HPA...lol. I have a Maple Leaf Decepticons 70 degree bucking with a Poseidon 6.05mm 363mm inner barrel and this gun was consistent with this HPA mag. I'm not a fan of the air tank and line but it didn't bother me once. This is with me not playing airsoft for over 6 months or more and the first time using a tank and line. I got my 68ci 4500psi tank off Ebay used for around $70 but had to get it hydro tested. I got the Redline Airsoft Mini SFR regulator/line here at Evike. You already made the jump into an expensive gun, now make it great with going HPA.

"Worked well in my WE SCAR-L. You can adjust the PSI to change the FPS much like a P*, but be careful not to go over 120 PSI. It cycled perfectly all the way from roughly 60 PSI to 120. Functions like a regular hi-cap.

"This works amazing. Using it for my emg pdw and its working perfectly. 90 psi gets me 330 fps with .25 bbs. Really recommend this hpa mag.