I see compliance rates listed in articles from time to time and they are not good for the states that passed such unconstitutional “laws” banning “assault weapons” and mags. Compliance is usually listed as 5% to 15% in those states. In the past owners of these items have been given a grace period to either turn them in or remove them from the state.
With laws such as these, enforcement is really a matter of someone turning in someone else out of spite or even a misplaced sense of civic duty. An ex-friend, neighbor, even a family member. The authorities will simply wait it out and take down one individual at a time. It removes these items slowly over time and at the same time sows distrust among the citizenry because they do not know who they can trust. Sucks!