Dan Mitchell demonstrates how the Universal Airsoft Mid-Cap Unloader works in this video. You can get one on eBay... "No more bent finger nails! No more blowing BBs everywhere when trying, but failing, to unload directly into a bottle or speed loader!
Quicker unloading at the end of a game day, pack up and get home quicker!
Keeping mags unloaded prolongs the life of the spring, this makes the job that bit easier!