Terry Maketa was one of the most vocal opponents of the law and he stated very clearly that if the law was passed he would be required to enforce it.
Six Years In, Few People Have Been Sentenced Under Colorado’s Large-Capacity Magazine Ban | KUNC
According to this article people were charged under the magazine restriction in 104 cases. They were found guilty and sentenced in 11 cases.
From the article
"Data from Colorado’s Office of the State Court Administrator analyzed by Guns & America show that since 2013, 104 cases have included charges for violating this statute.
Over the six years the ban has been in place, just 11 people, all men in their 20s and 30s, have been convicted and sentenced for violating the magazine ban."
As I said earlier, I don't think knowingly violating a law and hoping the police won't charge you is a good plan. You are essentially betting your future on what kind of mood the next cop you run into is in and from everything I've heard the cops in Colorado are becoming less and less supportive of the second amendment by the year.