Hi William and welcome. Yes, good to go in CO. Still best to check with a local FFL as there may be a couple of certain district interpretations regarding barrel length.
budsgunshop.com/feeds/state_reg/colorado_restrictions.pdf

I just pulled this from a quick Google search so maybe DOUBLE CHECK with your local FFL??
The Mossberg Shockwave is legal in Colorado if you have a federal tax stamp and the proper paperwork:
Federal definition of a shotgun
The Shockwave has a 14-inch barrel, which is four inches shorter than the federal requirement of 18 inches. However, the Shockwave is classified as a "Pistol Grip Firearm" and is not intended to be fired from the shoulder.
Colorado law
You can legally own a short-barreled shotgun in Colorado if you have a federal tax stamp issued by the Bureau of Alcohol, Tobacco, and Firearms (ATF).

Hi William, yes sir, there are no restrictions on the Mossberg Shockwave in CO, you are good to go.
budsgunshop.com/feeds/state_reg/colorado_restrictions.pdf ,
Stay safe & have a great day!