Huben GK1 carbine conversion with aluminum housing and AR15 stock length/height adjustable like new!

An offered Huben GK1 air pistol caliber 5.5mm, converted to a carbine with F suppressor, quad-rail Picatinny aluminum housing, and length/height adjustable AR15 stock. The installed carbine conversion kit is fully reversible, instructions on Youtube: https://youtu.be/j_oKuCIe79I

The firearm was purchased in September 2025 and has only been used as a demonstration model since. It is therefore in like new flawless condition. Original invoice is available, total new price of all parts is 1880€

Original case and original export kit are included in the purchase. Other stock variants can also be installed by arrangement, see pictures. The price is the same for all variants.

Only sold to self-collectors aged 18 and over! Pickup by appointment possible in 59821 Arnsberg or 39124 Magdeburg