You can still special order a Six Pack from Milt Sparks. 9 + 60 for the 1911. That should be enough to fight your way back to your rifle.
My current carry is a Springfield XD45. 13+1 in a package that’s smaller than a double-stack 1911. If I go to a mag that’s as long as the single-stack 1911 10 rounders, I get 15 rounds.
60 rounds is four magazines, not six, at that point. Six magazines nets me *90* rounds and a world of tactical possibilities.