Love the AirMarksman backbone and was an upgrade for me. I have the long verison on my UT airgun Slugger edition 800mm and two medium verison on my 700mm and 500mm compact.
Quoted by biohazardman in https://www.airgunnation.com/threads/would-this-work-for-my-fx-impact-mk1.915689/ You would also need to know if your Gen1 has the short reg piston with 11 x 8mm diameter belleville washers or is actually a Gen2 like mine with the longer 8mm piston and 16 x 8mm...
Uragan King .30 with NSA 43.8 Fx Impact M3 .22 UT Airgun Slugger edition 800mm with H&N 217 30gr. Fx Impact MK2 .22, 720 PP and power block 700mm with knockout 25gr Fx Impact MK2 .22 compact, 720 PP and power block with NSA 17.5gr
Rceived my Huma air regulator gen3 regulator for my MK2 Impact that I order from UT Airgun. Also ordered replacement burst disc on my Hill EC-3000. I popped one last night.
I started with the BOG Death grip and replaced it with the Vortex Radian ball and level head "arca-swiss". The BOG Death Grip failed me and dropped my Impact. This was my reason to replace it. I recommend using the arca-swiss system when picking out a tripod and keeping away from the grip...
Get ourself a donnyfl emperor or ronin with the externsion tube. I got the ronin with the externsion tube on my MK2 .35. Not as quiet as my Uragan King .30 with the emperor moderator with tube..