It's the Hogue Hand-All, Gary. About $13 at my LGS, and it's perfect for these.

I had to trim some on the one for the 4513, obviously. On the 457, I chose to let the sleeve come down to the pinky rest on the magazine, sorta like an extension of the sleeve. Makes the mag a bit harder to insert, but that's not a big deal for me. I don't plan to have to reload if I ever have to use it "for real," but I could if I wanted to and the adrenaline rush would probably be enough by itself to make this a non-issue.

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Ukraine -- now more than ever