In this week's Gunfight we have two takes on the .22/.410 combo gun: One, a .22 Hornet over a .410 barrel intended for survival; the other is a receiver with interchangeable barrels made for fun. he Hornet/.410 is a civilian version of the M6 Survival Rifle developed in the '50s by Ithaca and issued to U.S.A.F. aircrews into the 1970s. The Rossi .22/.410 is a versatile little gun that changes barrels almost instantly. I had the Trifecta version for a while (.22 LR/20 gauge/.243), and my younger son would have me time him as he swapped barrels. His record was 26 seconds.