he drums you need for this HPA ADAPTER are sold separately, they are available

FOR HOME INSTALLATION, YOU CAN USE A TM, ASG, Y&P OR STTI MK23 MAGAZINE.

Fully Assembled package means we fit a gas magazine for you. If you have a clone MK23/SSX choose the ASG magazine.

These adapters are made to fit your existing GBB magazines, and include a Single Stack adapter.

Full support and warranty is offered for these products.

US HPA Fitting as standard.

HOME INSTALLATION

Instructions can be found at airtac.me/instructions

Drum Adapter Info

Compatible with TM MP5/ TM SCORPION Drum Magazines
Also compatible with Jing Gong VZ61 drums, though these can be hard to source
100+ BBs from a full wind
Drum adapters include 2 25mm pins for installation of adapter onto drum
Disassembly of drum and installation onto adapter can be seen below (you can skip the middle section of video as this is specific to TM MP7)