I dabbled with the AKSU a bit and have some observations, but lately have been preoccupied with SGL31.
For the AKSU the ZenitCo B11 lower HG will be fine for a laser or light on the bottom 6 o'clock rail, but your options for the 3 and 9 rails limit your light choices because they are fairly shallow. My DBAL A3 will not fit the 3 or 9 rail if the standard polymer upper HG is mounted. Surefire X300 fits but other mounts may not
There is also a gas tube rail which looks like a combo laser illuminator would be great on, and it seems to mount the same was as the fullsize AK74 B10M + B33 do
What I am progressing with nicely is the SGL31 with ZenitCo B10m+B33 top cover.
I normally run the Kashtan P1 on the top rail and am learning the in's and outs of a DBAL A3. This lets me use the PVS14 as a head mount system and shoot with the A3, but Kashtan also works through the PVS14 (though it's best to remove the eyepiece, and the eye relief can be tricky when the PVS14 is headmounted)
In this photo I am experimenting with the PVS14 as a weapon mount with a T1, but I would prefer to use Kashtan which is 2.8x and good FOV
Recently discovered that I can move the weapon mount to the ZenitCo b19 short gas tube rail, which lets the PVS14 mount so that the bulk of tube is over the rear sight leaf. This puts the PVS14 a bit too high for Kashtan P1, but I discovered that Kashtan 1P is perfectly aligned, and gets the full FOV of the PVS14
I'll get some pics up when I get back from the EU but it looks like I will be able to keep the rifle in it's normal day light mode and then just clip the PVS14 onto the gas tube for night shooting
B19 attaches to B10M. You could mount something like the DBAL here but it will block the irons of course. For me the PVS14 weapon mount will go closest to the rear sight leaf so that I get the right FOV for Kashtan 1P
Z