Customs Service has seized 20,000 weapons awaiting entry into the United States and that they will be returned to their makers unless sold to U.S. law-enforcement authorities. The 43 types of weapons barred permanently are: AK47, AK47S, AK74, AKS, AKM, AKMS, 84S, ARM, 84S1, 84S3, HK91, HK93...