magazine

Hello, I have a 9mm colt combat commander like this: https://shopcoltguns.com/combat-commander-9mm/ and I have been having trouble finding mags. I spoke with Mec-gar and they recommended these: MGCGOV9LCB but they are too short by about the length of one round. What is the size breakdown...

had a couple WC mags not feed the last round . Especially in my wifes LB monolith have read a lot about magazines and their failures. before I tore it down, I tried pressing the feed lips inward a bit... mags now work perfectly. lesson--try the easy stuff first. hope this helps others