Cometa Orion SPR regulated: Transfert port Blocking

Hello!

I just received my orion and as Spain has a 23 joules restriction policy the gun come with a "hole reducting cap" that reduce the size of the transfert port.

The question is , Can I access the transfert port without emptying the gun as it has 200 bars with 300cc volume and a regulator set to approx 115 bars.

If not, how can I empty it without damaging the regulator ?