Got one for my Bday. It only came with one magazine. Will other companies 1911 10mm magazines work with it? Rock Island doesn't have them on their web site. Every time I click on the link I get "Error 404 not found".

Any 10mm 1911 mag should work. Probably wont find them any cheaper than here. https://gunmagwarehouse.com/all-magazines/handguns/1911-magazines--10mm-auto I bought a couple Metalform and a couple of the Mec-Gar, all work fine in my Rock Island and my Kimber. FYI I believe the ones listed as (Commander) may be too short for a standard 1911, but I could be wrong, it happened once before.