Complex sentence: The.69 caliber Musket had a 42 inch barrel, and more than 30,000 were produced by Springfield Armory and two contractors between 1840 and 1846.
Split into simpler sentences: The.69 caliber Musket had a 42 barrel. More than 30,000 were produced by the Springfield Armory and two independent contractors between 1840 and 1846.