Complex sentence: From the time of its introduction in the fall of 1949 the new pistol was a success, and though it faced competition from the beginning it soon dominated a large share of the rimfire pistol market segment.
Split into simpler sentences: From the time of its introduction in the fall of 1949 the new pistol was a success. Even though it faced competition from the beginning it soon dominated a large share of the rimfire pistol market segment.