It’s often said that the enemy of the good is the great. In situations where continuous improvement is a “do-or-die” way of life – for example, a Cold War military-industrial complex – the life of a merely-satisfactory design is nasty, brutish and short. Such was the case for the U.S. Air Force’s B-36 Peacemaker bomber. The Soviet equivalent? Comrade Sergei Simonov’s “Samozaryadniy Karabin Simonova, 1945,” known to the world today as the SKS carbine.