JR carbine has the worst field strip! have to take the whole stock off and it used screws not pins, the thureon defense comes apart with 2 pins. or if you have 2 grand to spend you could get a kriss. i think the big selling point of the kriss only really matters when in full auto, so kind of a waste to get one in semi. if you want a non restricted 9mm carbine i suggest the thureon defense GA carbine. simple strip as i already mentioned, one thing people like about the JRC more is you can use AR forearms, and can't on the thureon. i hope you enjoy what ever you chose! i was going to get a thureon, but i figured id give an XCR a chance.