The Bush administration yesterday imposed a permanent import ban on 43 types of semiautomatic assault rifles, including the Chinese-made AK47 and Israeli-made Uzi carbine. Stephen E. Higgins, director of the Treasury Department's Bureau of Alcohol, Tobacco and Firearms (ATF), said the government had studied 50 types of imported assault rifles and decided that all but seven were not being used for sport as required by the Gun Control Act of 1968. Shipment of the 50 types of weapons had been suspended since March, pending the government review. Foreign gun makers have 30 days to appeal the decision. Higgins said the study did not reveal what percentage of the 400,000 imported assault weapons already in the country had been used in commission of crimes. While the action bars entry of more than 750,000 weapons, it will not stop domestic companies from manufacturing weapons identical to those banned. "This is just a bonus to domestic companies because obviously they can raise their prices now," Rep. Fortney H. "Pete" Stark (D-Calif) said. "They won't be faced with cheaper imports, and their demand should go up." Of all weapons used in crime annually, Higgins estimated that about 10 percent were semiautomatic assault rifles and about half of those domestic. The ATF has estimated that domestic weapons account for 75 percent of the 3 million semiautomatics owned by Americans. Stark applauded President Bush for "having the guts to stand up to the National Rifle Association" but said Bush must take a similar stand against domestic weapons. If U.S.-made assault rifles were subjected to the same standards as those produced abroad, 17 would be banned, according to Treasury Secretary Nicholas F. Brady, who pleased and surprised gun-control advocates by saying so in written congressional testimony last month. Several bills, including one proposed by Stark and Rep. Tom Campbell (R-Calif.), would put controls on or eliminate many domestically produced assault weapons. While the government's action drew cheers from gun-control advocates, gun-lobbying groups expressed anger, and some accused Bush of breaking campaign promises. "One has to wonder whether one can trust George Bush," said John Snyder, public affairs director of the Citizens Committee for the Right to Keep and Bear Arms. "He ran on a platform of adamant support for the right of Americans to keep and bear arms . . . now he's already stabbing one of his main constituent blocs in the back." At the ATF news conference yesterday, Higgins held up a Galil, a semiautomatic version of a machine gun carried by Israeli soldiers. He said it bears the most militaristic characteristics of all the banned imports, including a large, detachable magazine and a grenade launcher. Higgins said the ATF study involved examination of the weapons by firearm experts, review of how they were marketed or advertised and whether they were used for sport. "Most of them are not being even marketed as hunting guns or sporting guns," he said. Some were being used for home protection and others for "going out and shooting around," he added. "We don't consider those to be sporting activities, and obviously some of those are being used in crime," he said. Higgins said the ATF found the seven acceptable weapons were used for hunting and in recognized gun competitions. Higgins said the odds of a successful appeal of the ban are slim because the government survey was comprehensive. He said that the 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, HK94, G3SA. K1, K2, AR100, M14S, MAS223, SIG 550SP, SIG 551SP, SKS with detachable magazine, 86S, 86S7, 87S. Galil, Type 56, Type 56S, Valmet M76, Valmet M78, M76 counter sniper, FAL, L1A1A, SAR 48. AUG, FNC, Uzi carbine, Algimec AGMI, AR180, Australian Automatic Arms SAR, Beretta AR70, Beretta BM59 and CIS SR88. The seven approved for importation: AK22, AP74, Galil-22, M16-22, Unique F11, Erma EM1.22 and Valmet Hunter.