I REALLY wanted one of these when first announced. A 50 round handgun using magazines I already own shooting a potent little cartridge that I normally carry, it was the perfect backpack and traveling gun that could be left loaded for emergencies. Then they announced the $1000 price and when released you couldn't touch one for that. Over the year I've gotten 3 of my 30 round mags to work perfectly in the FiveSeveN and so I've backed off my plans for getting the Kel-Tec for now. Really do appreciate the write-up on yours, it's good information for the future. Thanks.