G&G M4 - 2300 Round AEG Hicap DRUM Magazine (Manual) vest The Flat style hopup is

The Flat style hopup is quite popular

trigger for better trigger control

but is a very tight fit with the A5 handguard

Rounded edges for a very comfortable grip

G&G M4 - 2300 Round AEG Hicap DRUM Magazine (Manual) vest The Flat style hopup isG&G M4 2300 Round AEG Hi cap DRUM Magazine (Manual wind G 08 171). This is the largest drum magazine you can get for the M4 AEG. Fits in all M4 and M16 AEGs made by nearly all companies. Screw midcaps get this beast mode mag and dominate the entire battlefield with a smug face. Full polymer build, easy to wind, load, and use. Very smooth function for the most picky airsoft player. Please note there is no manufacturer's warranty or returns on drum