Complex sentence: The finished product became the Model 40 and 42 chambered in.38 Special and is alternately known as the Centennial as it was produced in the 100th anniversary of the founding of Smith & Wesson.
Split into simpler sentences: The finished product became the Model 40 and 42 chambered in.38 Special. The gun is known as the Centennial as it was produced in the 100th anniversary of the founding of Smith & Wesson.