You are about to buy, a brand new (amazon return), Splatter Ball Blaster TOY  Drum 1000 or 1500 rounds (I am not sure) Magāzine Suitable for M4/M4A1 Electric Loading, I will also include the M4 without barrel nor butt stock, still working (no battery, but I powered it directly in the pins that connects to battery, see pins in last pic), I don't have battery to test it but I tested it with a power supply.

See this other listing exactly like mine (copy & paste it in your browser):

https://www.ebay.com/itm/265855021331?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=6nKIftgfTTa&sssrc=2349624&ssuid=dz2XiJPDRLi&var=&widget_ver=artemis&media=COPY


or search item number 265855021331

The items show scratches from handling.

I really don't know the brand, nor model but please inspect carefully all pics because I won't accept returns, I powered the M4, and also, the drum alone, to make sure they are working.

Everything in pics is included (M4 and drum) no battery.

The M4 can be used like it is now, just add a battery and gel balls.