We, for the most as civvie CCW'ers tend to romanticize the hand gun as the ultimate tool of the warrior against evil, how some ever, that is because we would get a lot of funny looks if we were to go walking about with an M-4A1 carbine.
I would stick to making the protagonist's primary being as authentic as possible and also his most used weapon.
NRA Life Member
Big Sister: "Everyone in America is fine with the .30-30, except Mack. He has to shoot that .35 because that extra point zero fives inches will matter on Bigfoot."