[Xenos-Fear]

First, gotta find how to get to the quick changing spring mechanism. Cause I don't have a clue to get to this. lol I'll check the manual... but... as I see, they don't give any clue on this.

Seems like I got to dismantle the buffer tube... but... there isn't any screw. Does anybody have done this before ? Don't want to break something I shouldn't cause I tried something bad on it.