In their Tech Tuesday video, Airsoft Master shows how to fit a battery into a PDW AEG... "Yes! I know we all seen issues with PDW'S and how difficult it is to pick a battery for your PDW! Well why don't we solve this issue with Dr. Mike G in the house for Airsoft Master! We use the ARP 9 1.0, Kwa Eve 4, and Specna Arms C25 pdw AEG rifles as our benchmark test on certain PDW airsoft electric rifles. Check out these test fitment on 11.1 or 7.4 lipo batteries on these rifles! You can also get your parts from Airsoftmaster.com and a big shout out to my buddy for stopping by and welcome back to Socal!"