Here is another piece of reality for you , suppressors are considered dangerous weapons under Colorado law ,

http://www.lexisnexis.com/hottopics/...R.S.+18-12-101

http://www.lexisnexis.com/hottopics/...R.S.+18-12-102

and the NFA transfer is considered an affirmative defense which allows the possession of them , no NFA equals no affirmative defense and suppressors are now prohibited . Ain't reality grand .