The same rifle, drs 600mm from a new batch (it has the clicking hammer adjuster) I think it is a artifact in combination with the sun. But you can't deny that the anodising isn't as solid as the saber chassis 😁 Outside in the sun: inside tha house:
For the US, search Ball Nuts Knob... https://www.amazon.com/s?k=ball+nuts+knob&crid=W3RLEG0CRY3U&sprefix=ball+nut%2Caps%2C189&ref=nb_sb_ss_ts-doa-p_3_8 Just asked him for some more pics how to modify and mount it on the lever...
OMG, really a way to completely rape such a nice gun. By the way, are you allowed to make modifications to a rifle yourself and then start shooting PRS competitions? On the right track!
That's a universal bracket with 1/8 and other to choose thread. Not specific for fx;) https://www.sekhmetonline.com/products/outgun-angled-pressure-gauge-bracket-for-fx-brk-skout-airforce-airguns
You have a point here, know that this drs in the photo above only has a 500mm barrel. If you were to mount this saber chassis with a 600 or 700 mm barrel, I don't think it would look as nice.
It would also be visually better if there was a plenum that had a volume between the original largest and the original smallest plenum! Although it is also very okay now ( see mine);)