we katana aeg converted to a katana pdw 556 with electric blowback still active it has tbb and systema hopup unit etc also has had a full overhaul before adding the conversion of a mlok short handguard and then a pdw patriot stock it has four m4 stanag mags. 
I purchased a 11.1v recently but realised no mosfet vetoed putting battery in so will need a new battery of a 7.4v and be a small block as it has very small compartment. 

Looking to sell or swap for decent ak build prefer solid stock style or a vss etc