It comes with a US HPA Tap - But a pistol magazine is not included

there are 3 magazines with space for 12 shots

making it compatible with most air rifle brands

one for your pistol and an extra one for 2 extra magazines

The rifle also has Hatsan's Quattro trigger system

Creeper Concepts Hi-Capa HPA Adapter til M4 Mags 111V-1000-S It comes with a USBO Manufacture, together with Creeper Concepts, has made this 3D printed HPA Adapter so you can mount M4 magazines in your Hi Capa pistol. It is printed on a special Nylon Sintering Printing (SLS Technology) which is required by FCC, AirQB and SpeedQB. It comes with a US HPA Tap But a pistol magazine is not included, you have to get that and put it on yourself!