HPA airsoft users might want to check the ReMag System and this video from Supa Adventure shows how it works and what he thinks of it... "Hey guys! Big shoutout to Kevin from ReMag for hooking it up for this video! You'll see my excitement for this product in the video. When I say that this is actually a revolutionary product that more people need to know about, I mean it! It's unique, practical, and 100% a good buy if you're in the HPA/GBB world."