IVA Custom show their 3D-printed adapter to allow the Modify PP2K GBB to use HPA as power source... "Joint project with Khimik - Airsoft to convert PP2K from Modify to HPA Supported by Lenin Solutions.

The adapter is completely printed on 3D printers. The main body is made of ABS-like photopolymer resin, the magazine and cover of the elastic band are made of PETG plastic, the elastic band is inkjet printed."