I have one (and used to have 2). They are great to shoot. So "beefy" there is almost no recoil.

I have bought repro magazines (Triple-K) on-line relatively inexpensively, but I had read on a Spanish firearms forum that you almost always had to modify them. That is what I discovered as well. They seat fine, but are too tight to eject when you release...and you have to REALLY get a good grip on them to pull them out. I smoothed them out on the side with a Dremel tool, basically taking away the layer of paint and a tiny bit more, and they work fine.