Just for info or for who is interested:
There is a new extended ARCA rail for the FX Impact available with some nice features included
Ā It is from the UK company called Precision Rifle Systems.
It is quite similar to the Saber version at first glance but there are some added features which sets it apart:
I've been using this rail for little over two weeks now and really like it! At first I didn't know if the detachable picatinny rail would bend or move while a bipod is attached but this is absolutely not the caseĀ
All in all a great piece of gear! Thought I'll add a picture of it in use on a tripodĀ 
There is a new extended ARCA rail for the FX Impact available with some nice features included

It is quite similar to the Saber version at first glance but there are some added features which sets it apart:
- The edges of the ARCA rail are nicely rounded for improved sliding in the clamps when not fully tightened
- two MLOK slots included in the rail
- barricade stop included which can be placed in two positions (the forward position has a 50mm clearance to be able to put a tripod clamp behind it)
- Front picatinny rail is detacheable and can be replaced with other parts (I understood these partsĀ will be available somewhere in the near future)
- and a dust cover included for the fill port
- Rubber protection button inbetween the rail and bottle
- Enough clearance for the middle finger to comfortably use it with a Ergo TDX0 grip (hadĀ my Saber rail milled down to have a better fit with this grip)
I've been using this rail for little over two weeks now and really like it! At first I didn't know if the detachable picatinny rail would bend or move while a bipod is attached but this is absolutely not the caseĀ

