20 rounder marked "40 S&W" but I've been using it in an Olympic 10mm upper. It was built by Oly using a UZI .41AE mag. Excellent condition, hard as hell to load I can get twenty stuffed in before my thumb gets tired $80.
15 round 10mm magazine built from a UZI .45acp magazine. Again, welded up and parkerized by Olympic, tough to load, excellent condition $70.
If one had a mind to, the feed lips could be bent up to accomodate .45ACP or bent down for firstname.lastname@example.orgBoth magazines are Sold Pending Funds.