Stock hop up unit, Maple Leaf Barrel and Maple Leaf Super Macaron 60 degree bucking. No modification needed, stock internals (360fps even after tens of thousands of bbs). It's more than accurate for CQB but I still believe it could do better for outdoors (maybe Maple Leaf Mr. Hop bucking and/or ZCI barrel, idk).
I've already shot more than 12k rounds with it and not a single issues. I know it is anecdotal but it is far from crappy and I actually expect it to last (especially with 7.4v).
Has anyone tried these magazines in DE replicas with polymer bodies? https://www.taiwangun.com/midcap-magazine-aeg/150rd-capacity-ar15-polymer-magazine-black-battleaxe?from=listing&campaign-id=20
This is the biggest one I can fit inside M904G (pdw stock). https://hobbyking.com/en_us/turnigy-nano-tech-1200mah-2s-25-50c-lipo-airsoft-pack-t-connector.html
https://www.taiwangun.com/midcap-magazine-aeg/110-round-polymer-magazine-ar-15-m4-black-battleaxe These fit well. Choose magazines that have this part small because it is causing fitment issues if it's big.