Avengers 1200 Round 9V Electric Drum Magazine for Airsoft AEG Rifles (Model: Masada - Tan / Button)

"Good so far. First off, the SR25 version works really well with the new Havok Gen-12 HPA shotgun making that gun and overpowered beast because I now have 150 shots of pure shotgun goodness!

The battery door is head by a single screw and is powered by a 9v battery and so far a single battery have fired off the full 1200rnds without issue.

The only issue I see in this mag is, the sound triggering is super sensitive. After 1 shot it winds a lot to the point where it starts to over wind and that's not good. Overwinding is the bane of drums and high caps existence and one of the reasons why people (me included) switch to mid caps. Also, is it has a latch that moves side to side, why? I don't know what this latch does since there are no instructions included and Avengers doesn't have a website so.... You have to figure this out on your own.

Overall it's holding up with my Wolverine Gen-12 and I'm happy but only time will tell if it will eventually break due to overwinding.