Local ordinances not preempted by state law, §16-15-7. Participation in criminal gang activity, §16-15-4. Penalty enhancements. Additional punishment upon felony conviction, §16-15-4. CRIMINAL STREET GANGS —Cont’d Participation in criminal gang activity —Cont’d Penalty enhancements —Cont’d Machine gun, sawed-off shotgun, sawed-off rifle or firearm with silencer used in committing, §16-11-160. Separate offense.