Huben K1 air rifle bipod

The model contains two versions of the bipod, one with thread and carbon fiber inserts and one with inlets for normal M4 size nuts and solid models. The bipod works for all K1 calibers, and might fir your GK1 pistol too, see the measurements. What you need for parts is 6 to 8 M4 nuts, 6 if you use two 5 mm M4 thread inserts 500 mm of 5 mm carbon fiber rod, super glue or epoxy and 8 x 10 mm M4 bolts.

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