I have a 33 9mm round Glock mag (Not Glock mfg, KCI maybe) I'm looking to trade. Only thing I'm looking for is AR-15 BUIS, nothing else. Can add cash/ammo/accessories on top of the Mag if you have a nice rear sight. My number one want is : Flip up Troy Dioptic Rear sight (don't care what color) Will consider majority of rear sights, however I'm not looking for carry handles or UTG products. I will consider all rear sights (fixed and flip-up) of all reputable manufactures. EDIT: Omitted that it was 9mm, thanks guys!