The TacStar Mag Extension Rem 870 +3 is a modular magazine tube extension designed specifically for the Remington 870 12 gauge shotgun. Machined from tough 6061 aluminum with a matte black anodized finish, it adds three extra rounds of capacity while keeping weight low and handling balanced. The knurled end cap and clean cylindrical profile make installation straightforward and give the shotgun a refined, purpose-built look.

This +3 extension is ideal for shooters who want more time between reloads for range sessions, training, or competition with their Remington 870. The included long magazine spring can be trimmed for reliable feeding, and the high visibility follower is easy to spot at the loading port. A recessed section accepts a magazine/barrel clamp for added stability when desired. TacStar’s attention to fit, function, and smooth operation makes this extension a practical upgrade for one of the most popular pump shotguns ever made.

• Manufacturer: TacStar
• Model: Remington 870 +3 Magazine Extension
• Firearm Fit: Remington 870 12 Gauge
• Capacity Increase: +3 Rounds Over Factory Magazine (2 3/4" Shells)
• Material: 6061 Aluminum
• Finish Color: Matte Black Anodized
• Included Components: High Visibility Follower And Long Magazine Spring