This creates an interesting situation. Here is the background.
1) At various points, the SCOTUS established that the US congress is superior to state legislatures, and that the federal courts are superior to state courts. However, they have *never* decided that the POTUS is superior to state governors. So when they come to loggerheads, the only way the POTUS can enforce his will is by sending in the Army.
The last time this happened was President Eisenhower against governor Orval Faubus of Arkansas, to forcibly integrate the Little Rock high school. Faubus called out the state guard, which Eisenhower trumped with the 101st Airborne Division.
2) I say this as background, because the SCOTUS has also *never* found that state governors are superior to county Sheriffs, who are the top legal authority in a county, and in common law, county Sheriffs are also the leader of the county militia.
3) Thus, a county Sheriff could ignore state and federal law to a great extent, by declaring that all “adult persons of good character” are part of the militia, for which they may be required (not enforced) to be armed. In effect, they are law enforcement officers. So if the state or federal government try to disarm them, they can only do so if they disarm *all* law enforcement personnel in the state.
The bottom line is though the legislature has outlawed certain weapons and magazines for “public” ownership, they cannot reasonably outlaw it for LEOs as well, or they would be helpless against criminals.
Sheriff Maketa in El Paso County (Colorado Springs) has made similar statements regarding enforcement of these infringements. Many sheriffs have testified in our legislature against these so-called laws. Really it’s the City and County of Denver (plus some outliers like the municipality of Aurora) against the whole state. I won’t spend a dime in Denver, except for parking sometimes, and I pray daily that the governor’s pen runs dry.