I am a lefty too and the 1911 is my primary pistol. You can have an ambi installed. Quality varies and, depending on how you grip a 1911, you may want to look to a Wilson Bullet Proof or Caspian model. I (like others) have a tendency to ride the ambi-side safety with my right thumb. This can lead to the ambi-side safety lossening on some designs. The Wilson and Caspian designs are supposed to help eliminate that. Some ambi's have wider ambi-side paddles than others. I like the narrower designs for range and carry. For competition, I like a wider paddle so it is easer to reengge the safety when moving.