Magazine Extension Tube from Japan
A 12-gauge magazine extension tube increases shotgun capacity for Remington 1100, classified under HTS 9305.99.60.00 as an accessory for heading 9303 shotguns. It threads onto the factory magazine tube.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Declare exact capacity increase (e.g
• +2 rounds) and gauge/thread specs
• Aluminum tubes need anodizing type specification
• Note compliance with federal 922(g) parts count rules