An interesting development with the Odin Innovations' M12 Sidewinder Speedloader. In this video of Airsoft GI, Wallace Lau of ZShot explains that they are open-sourcing the 3D designs of the adapters for the speedloader, allowing anyone to download and 3D print an adapter so they can use other magazines with the speedloader... "The Odin Innovations M12 BB Speed Loader is an essential piece of gear for every airsoft player's kit. With the quick spin of a crank, almost any M4 mid-cap magazine can be fully loaded in under 5 seconds. The compact size of the M12 Sidewinder perfectly fits inside any double M4 mag pouch to easily be carried into the field. The capacity of this speed loader allows you to load twelve mid caps before needing to refill. Designed by an airsoft player for the players, the M12 Sidewinder is the last speed loader you'll ever need.

If you are like most airsoft players, you dread the time consuming, tedious task of loading your mid caps while preparing for a game. You probably plan on loading your magazines in the staging area. You may keep a thumb loader on you. Maybe its on your vest or in your pack but it will only load most of one magazine before you have to refill it. The M12 Sidewinder was created out of the thinking that if most speedloaders were more practical, then they could be used in game. Odin Innovations took a different approach in how they created the speed loader. Not only did they take the time to alleviate some of the flaws in other loaders, they also focused on airsoft play itself. Odin Innovations wanted to make sure the experience users received was an end-to-end positive experience, not just another thumb cramping one."