Another point here is that it adds it to the definition of a dangerous weapon under C.R.S., in the same category as a short barrelled rifle.
There is an affirmative defense if you possess a valid "permit" for the dangerous weapon.
It would be a decent at worst, and likely very strong argument that a tax-stamped weapon (e.g. a SBR) has a valid "permit and or license" for the weapon, and thus the "Rapid Fire Device" prohibition would fall under the same affirmative defense that lets you own an SBR:
https://cbi.colorado.gov/sites/cbi/f...018-12-102.pdf
Again, so long as your judge doesn't have pink hair and pronouns - I suggest moving any binary triggers in one's possession to tax stamped weapons (SBR/SBS). The affirmative defense is "for the weapon", which you have if you have the tax stamp in hand. YMMV, no guarantees, not legal advice.
ETA: If you buy the factor configuration, SBR it w/ the tax stamp. Two layers of defensive argument there.