Bought a bunch of these, expecting the Democ(rats) to do something stoopid. I'll keep what I need, and sell three of 'em, brand spanking new/never loaded. These are factory Glock 21/21SF ambidextrous magazines, each holding 13 rds. of America's finest, .45ACP! These mags WILL work fine in your standard G21. $75. shipped Priority mail for the three. Would rather trade for an RH OWB holster for my G21SF (1913 rail).....preferably a CompTac (belt or paddle).