I have that one Sandman, and no way would I expect it to hold zero.
It fits very snug in the handle, but it's only one screw holding it there.
Add to that, that the scope sits quite high on the rifle. No way are you gonna get a good cheek weld on it.
If you're talking about a removable carry handle that goes back to a flat top receiver, JLA has it spot on. The PEPR is the way to go.
Sad to hear that Josh sold his. Heres a couple pics of mine.