got mine without an.orange tip, check airsoftdepot. (It was the pdw version) qd flash hider pops off with lil twist after opening the lock switch. Then there is a brass (painted black) thread protector, its textured unscrews clockwise exposing the -14mm threading.
also the the rail on the one you pictured is available at airsoftparts.ca tho you have to remove like 8-10 screws every time u wanna swap the battety
http://www.airsoftparts.ca/store2/in...roducts_id=364