REMINGTON 410 BORE MAGAZINE TUBE INSERT FOR REMINTON 1100 The Remington 1100 .410 magazine tube insert (associated with SKU F31610 is an OEM factory-made component constructed from durable steel with a black finish, engineered to reduce the inner diameter of the 28-gauge magazine tube so it can reliably feed .410-bore shells; built to Remington's original specifications, it ensures proper fit, consistent function, and long-term durability within the shotgun's magazine system. NOTE: These magazine tube inserts are new, authentic Remington products acquired directly from Remington's OEM inventory. This item is guaranteed to be unused and fully Mfg: Brownells