Selling my old reliable as I don't see me using it for a long time now that my AAP-01 has been boringly relegated back to the role of sidearm. 
As fun as the drum mag is, its an absolute unit and fucktuples the weight of the gun as you can imagine. 

In good working condition but as you can see from the picture its been well used. The rubber bumpers have some scuffs but the dirt is is just superficial dusty floor debris and will be easily brushed off before I post it, but I wanted to keep it on for the pics just to highlight the fact that it has indeed been used. 

Gas tight with no leaks. 

A little note about shortstroked pew pews: 
This mag (and probably all the Armorer Works style drum mags I'd imagine) can't keep up with crazy high firerates because of the type of spring they use. Aftermarket versions might be available somewhere? maybe? don't quote me on that. But I put a 250% spring, lightweight skeletal blowback unit and 2 cow-cow shortstroke buffer pieces in my AAP-01 and this mag could not keep up on full auto. 

I found the sweet spot was 125% and a single, shortstroke buffer bit with the lightweight bolt, so your mileage may vary.
If you're running your pistol stock then you wouldn't need to worry. 

Postage is £5.