HTS code 9305.91.10.00 covers "Parts and accessories of articles of headings 9301 to 9304 › Of shotguns or rifles of heading 9303 › Of military weapons of heading 9301 › Of rifles" under the US Harmonized Tariff Schedule. This is the official duty rate charged by US Customs when this product is imported into the United States, sourced directly from the U.S. International Trade Commission and refreshed daily.