John,
While you say pilots need a lighter firearm than an M1911A1, I will put in my $.02 (or rather, my grandfather's). As a fighter pilot during Korea, he was issued an M1911, and said that the heft did not bother him nor did he ever want to go anywhere without it. He said it gave him a piece of mind, and that other pilots that were issued revolvers did everything they could to acquire a 1911.
He also said (of my M&P), that I needed to man up haha. He said that he would carry that 1911 and 7 rounds of .45 ACP 5 miles before he would carry a polymer pistol 1 mile.
Yes, they may be heavier, but saying a pilot needs something lighter is somewhat of a blanket statement that is not entirely truthful.
Sent from my HTC One X