yup that is correctI belive its because since you have it cocked (from locking the slide back to lift the disasemly lever) your sear is holding the fiering pin, and as long as it is doing that the slide is not free to move forward...I may be wrong...but thats what I have been able to figure out by playing with mine..
The XD(M) has a lever that drops the sear when the take down lever is removed eliminating the need to pull the trigger. This lever can be removed and the gun will function like an XD, you will have to pull the trigger to drop the sear.Thank you both for that explanation.
What is different with the XDm design that makes dry-firing on disassembly not necessary?
No the sear components are totally different on the XD and will not accept the XD(M) parts. The tread among tuners of XD(M)s is to remove this bar to create a better feeling trigger. I personally have no problem with pulling the trigger to release the slide.