Some said they don't mount to the removable handle correctly? is that true?

Yes its true - why else would I have posted that in the other thread (and this REALLY should be in the Optics forum).

The Detachable carryhandle is narrower than the standard carryhandle.  As such NONE of the carry handle mounted scopes or mounts properly fit in the groove.  They will sit high (about 1/4" IIRC) which screws up your cheekweld and prevents you from using the irons (as most of these optics normally let you still use the optics.  Since the optic is not firmly against the bottom its also MUCH more prone to being knocked out of alignment.