Airsoft Nailgun: MIDCAP prototype presentation

You’re a lot to ask me for spare magazines for the pneumatic nail gun. Because it’s not possible to buy standard spare magazine to modify them into airsoft mags, and also because standard magazines aren’t convenient enough (not holding bbs, low capacity), I designed a proper midcap for the nail gun. Here it’s the prototype presentation, can you count how many bbs was in the mag during this presentation? And because currently I don’t have a spring long enough, the magazine wasn’t running at it’s maximum capa