S&T M249 MK2 SAW Sports Line AEG with Drum Magazine - Black 
 
Battery 11.1V won't fit on the top cover, unless u can fit the 11.1V into the stock
 
Heavy duty design yet extremely lightweight for mobility and longevity in combat! Fiber-reinforced nylon polymer receiver, handguard, top cover, stock and bipod)
Compatible with most A&K and A&K clone metal M249 series components
Version 2 Metal gearbox with tricked out internals (specs below)
Quick change spring, lipoly ready internals, and Marui M4 system compatible for easy tune-up, repair, and upgrade
Aluminum alloy barrel assembly with metal locking mechanism
Rotary dial hopup provides precise adjustment
All M4 / M16 AEG type magazines and can be equipped with various drum mags available from S&T and A&K
Mk2 style fix stock and full RIS handguard