The drums you need for this HPA ADAPTER are SOLD SEPARATELY, they are available here

Our range of pistol HPA adapters is designed to fit your existing GBB magazines. We offer full support & warranty on this product. This adapter gives you a realistic-looking setup, without the burden of green gas magazines.

Features:

• Compatible with TM/WE/NOVRITSCH magazines

• Same capacity as the larger Armorer Works drum without the bulk and weight

• Fits up to the grip for a great aesthetic

• Includes single stack adapter

• US Style Fitting as standard

We offer two drum options, the first being a JingGong drum, which performs great and is dead cheap. The second being a Tokyo Marui drum, which is higher quality overall, however comes at a price. The drums are nearly identical aesthetically.

If you own one of our ‘small’ drum adapters already, the drums can be swapped around freely between adapters by pushing out two pins. Very simple.

DO NOT EXCEED 150PSI WITH ANY AIRSOFT HPA ADAPTER.
ALWAYS USE AIR REGULATED BY A SECONDARY REGULATOR (EG AT200, WOLVERINE STORM, POLARSTAR MRS).
CHECK YOUR PSI BEFORE CONNECTING AIR TO A HPA ADAPTER.
NEVER CONNECT OUR EQUIPMENT TO PAINTBALL AIR TANKS OR CO2 TANKS.
NEVER CONNECT OUR EQUIPMENT TO A TIPPMAN STYLE HPA LINE

Drum Adapter Info

• Compatible with TM MP5/ TM SCORPION Drum Magazines. Available here
  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 the adapter onto the drum
• Disassembly of the drum and installation onto the adapter can be seen below (you can skip the middle section of the video as this is specific to TM MP7)