Got a lightly used mp9 drum mag by tapp. Works well and feeds my mp9 very well with Japanese spec bbs (5.85) Most people don’t know that on the majority of kwa guns and Japanese made guns, the jap spec bbs will work better because they’re smaller and won’t be get damaged on the metal feed lips, when I switched to the jap spec bbs I noticed a huge difference in shot consistency, especially on full auto where more damage is capable on happening to the bb. Looking to sell or trade for the primary Airsoft mp9 m4 magazine adapter.