A quick overview by BZ Tactical of the VFC Maxim Defense MD9-K GBB SMG, a compact airsoft replica that manages to look professional without trying too hard. The package arrives with the expected essentials, including a hefty 50-round magazine that seems ready for more than just a light afternoon jog. It is a full-metal build, which means it has enough weight to remind you it’s there, but not so much that you’ll need a gym membership just to carry it around.