H&K MP5 Walther by Umarex MAGAZINES.
Hold the loader in your left hand, and press the adapter lock with your thumb. With your right hand, hook the Mag Adapter into the top of the Lightnin' Grip Loader and swing the bottom into the slot. Take your thumb off of the lock button. it should pop out to the locked position when the adapter is in fully seated.
Insert your magazine into the adapter until it latches into notch.
To remove the magazine, while holding like pictured here, gently press down on latch and pull out.
LIGHTNIN' GRIP LOADER INSTRUCTIONS
1.) Slide open the Bullet Reservoir Cover and drop in up to (50) 22LR cartridges.
2.) Close cover. Gently shake the Lightnin' Grip Loader, keeping it level andthe reservoir cover on top.3.) Raise the reservoir end to slide the cartridges in to the Loading Channel.4.) Repeat #2 and #3 until the Loading Channel fills sufficiently.
5.) Raise the reservoir end and smoothly squeeze the trigger to load a round
into the magazine. The trigger needs to return to the nearly out position toseat the round and stage another bullet for loading. It is usually a good ideato count the bullets going in to know when to stop. It is possible to force in anextra round.