Like most gun owners, I think of being able to share magazines between guns to be a Very Good Thing ™. Not only can new mags be expensive, but it simplifies storage when I can just dump a bunch of them in the same box. Plus, if you live in a mag-cap-limit state, it can be super convenient to be able to use what you’ve got grandfathered in, rather than hunt up 10rd mags.
Therefore, I was interested in finding new ways to use my unmodified Uzi magazines in places other than my Uzi. And, since I am a great lover of pistol caliber carbines and AR-15s, it seemed like a 9mm AR-15 would be just the ticket. There is a product that let me do this: the VM Hy Tech (VMHT) Uzi magazine adapter.