DSA extended cover/mount, which will seamlessly interface with railed handguard––an option for the future. I don't believe the railed HG is stable enough for optics, but it is fine for lights and so forth.
As for using a higher mount which might introduce cheek weld issues, nix on thaat. Besides, removing the dust cover is not at all required to maintain the rifle, so a lower cover/mount is preferable, IMHO.
The DSA mount is optionally availavle channeled out to accept an ACOG, an excellent optic. Going this route lowers the ACOG a good bit, BUT since it is bolted to the cover/mount, quick removal is not possible in the unlikely event of scope mishap. You can still use other scopes with this channeled-out mount/cover.
Another optional feature of the DSA mount/cover is its' ability to accept a brass-catcher. a nice touch if you, or a friend reloads.
On my DSA mount, I have a Burris Fullflex 3-9Xx42 with ballisticplex reticle that includes reticular hold-over hash marks out to 500M. Mounted in Leupold medium QRW mounts. FWIW, I have a standard StG58A stock, and I don't need a cheek riser.
AFAIK, your ARMS mount closely resembles the DSA unit, while lacking some options. If you are on a tight budget, and/or the optional features of the DSA mount/cover are of no interest, I believe the ARMS mount/cover will serve you well, as long as it is properly installed.
I suggest carefully de-greasing all the threaded fasteners and mounting it on your rifle carefully. Thououghlly function-test. After testing, remove fasteners one at a time, and blue-Loctite each one prior to re-tightening. Your mount will be removable if you wish, but will not loosen by itself.
One other possible approach is to obtain a spare rear sight aperture and drill and tap it so it will accept replaceable apertures which are commonly available at Brownell's and Midway. The apertures allow much smaller peep diameters, and doing so might extend your iron sight years a bit. I've done that, also.