M4 Carbine Stock Assembly
Adjustable telescoping buttstock for M4 carbines (heading 9303), made of polymer and metal, excluding shotgun or rifle models. Enhances stability and adjustability for tactical use on military-style firearms. Classified under 9305.99.40.00 for parts of other 9303 articles.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If designed for rifles under 9303
Rifle stocks have a specific subheading in 9305.20, separating them from 'other' parts.
If primarily aluminum construction
Aluminum stocks without firearm specificity may shift to Chapter 76 aluminum articles.
If sold as a complete weapon conversion kit
Kits enabling weapon function classify under 9307 as swords or similar, not parts.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Submit detailed blueprints or photos proving compatibility only with 9303 non-shotgun/rifle firearms
• Comply with ATF import permit requirements; track serial numbers if stock includes serialized components
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