Huben GK1. Point of Impact Full Pressure Test

In this video i finally get to the bottom of my Huben GK1 accuracy issues. I lock the gun in a vice and test the point of impact from full pressure to determine if the gun needs a regulator. I fire off 95 shots and monitor the point of impact shift through the pressure range. It starts off with a 4inch spread and tightens up to about a 1 inch group. The Huma-Air regulator is ordered and will be fitted in the next week or so once it arrives.