Description
The SDS Imports TX3 +1 Magazine Tube Extension is one of those upgrades that just makes sense. It threads directly onto the end of your magazine tube and adds a single round, taking your Tokarev TX3 from 4+1 to 5+1 with standard 2 3/4 inch shells. No cutting, no drilling, no trip to the gunsmith. If you can twist off your factory end cap, you can have this installed in about a minute.
It's built for the Tokarev TX3 family, which covers the 12HD, HDA1, Titan, and Hammer 12 gauge pump guns. This particular version wears a nickel marine finish, so it matches up nicely with the silver-finished models and shrugs off moisture better than a plain blued part. The body is steel, which is exactly what you want on a piece that takes recoil and spring pressure round after round.
What the TX3 Tube Extension Actually Does for You
That extra round matters more than people give it credit for. Whether the gun lives by the back door for home defense or rides along on a weekend clays outing, going from four to five in the tube means one less reload when it counts. The direct-thread design keeps everything low profile, and because nothing is permanent, you can pull it back off any time you want to return the gun to stock.
Fit and Feel on the Tokarev TX3
Owners consistently report a clean, glove-like fit that lines up with the factory tube and looks like it came on the gun from the box. The finish is a solid color match on nickel models, and installation really is as simple as it sounds. It's a practical, affordable way to squeeze a little more out of a shotgun you already trust, and it plays well with range days, field use, or keeping a capable pump ready at home.
Key Specifications
- Manufacturer: SDS Imports
- Manufacturer Part Number: 80041435
- UPC: 723551440031
- Model: TX3
- Type: +1 Magazine Tube Extension
- Fitment: Tokarev TX3 12HD, HDA1, Titan, Hammer 12 Gauge
- Gauge: 12 Gauge
- Capacity Increase: Adds 1 round (5+1 with 2 3/4 inch shells)
- Shell Compatibility: 2 3/4 inch
- Material: Steel
- Finish: Nickel Marine
- Installation: Direct-thread, no permanent modification
- Shipping Weight: 0.205 lbs
What’s Included
- SDS Imports TX3 +1 magazine tube extension
Frequently Asked Questions
Which shotguns does the TX3 magazine tube extension fit?
It's designed for the Tokarev TX3 series in 12 gauge, including the 12HD, HDA1, Titan, and Hammer models. It threads directly onto the factory magazine tube in place of the end cap. Double-check that your gun is one of these TX3 variants before ordering.
How much capacity does the extension add?
It adds one round to your magazine tube, taking most TX3 pump guns up to 5+1 when running standard 2 3/4 inch shells. It's a single-round bump rather than a big extended tube, so it keeps the profile close to stock.
Do I need a gunsmith to install the TX3 tube extension?
Not at all. It's a direct-thread design that installs in about a minute by removing your factory end cap and threading this on in its place. There's no cutting or drilling, and it's fully reversible if you want to return the gun to stock.
Does the nickel marine finish match my silver TX3?
This version comes in a nickel marine finish that pairs well with the silver-finished TX3 models. Owners often note it looks like a factory part once installed. If you have a black TX3, SDS also makes a black-finished version of this extension.





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