Not disputing what Solo says, but the dovetail to barrel height is the same
across the board with the Cyclone family of guns.
I'd say, go for LOW adapters (its a real shame to ruin the FX design). The lowest I've ever found are the B-Square #17025, they are also sold under Hawke branding (HS#17025),
http://www.opticswarehouse.co.uk/produc ... l+Adaptors.
They are a great, close fit to FX dovetails & as you'll have noticed from my Storm NV photo
these NV units sit high 
. Actually all Dedicated NV tends to sit high (whatever the Gen).
With the Sentinel I find eye/head position is fairly critical but if you have the reticle on its lowest settings its easier to see when its wrong.