Efficiently feed your magazines with the PKM Box Magazine Insert. Our Cattle Drive springless feed system eliminates warping, misfeeding, and jamming, ensuring a seamless and worry-free operation. With no compromises on performance, you can know your PKM is going to feed flawlessly! We have designed this to store your additional battery inside and it is easy to get to without compromising space for your ammo! 

You will need a TCU if you are running HPA.  AEG operation will use the battery that runs your replica, this is a very efficient system and won't drain your battery too fast!