Description
When you run out of shells in the middle of a hunt or a range session, the last thing you want is to be digging through your vest or pockets. The TacStar SideSaddle mounts four spare 20-gauge rounds directly to the side of your Mossberg 500 receiver, so a reload is always right where your hand already is. It's a simple upgrade that pays off every time you top off the tube.
The build is straightforward and made to last. A black, corrosion-resistant polymer shellholder grips each shell with enough tension to keep them put through recoil and rough handling, while a rugged aluminum backing plate gives the whole unit its rigidity and keeps it flush against the receiver. At right around six ounces loaded down with hardware, it won't throw off the balance or handling of your 20-gauge.
Bolting the SideSaddle onto Your Mossberg 500
Installation is about as easy as it gets. The carrier uses your receiver's existing pin holes, and every mounting screw you need comes in the package, so there's no trip to the gunsmith and no drilling. Most folks have it on and squared away in a few minutes with a basic screwdriver. Worth noting: the design leaves clearance for longer forends, and some field-grade shotguns may need a small forend tweak, though guns running a TacStar pistol grip forend drop right in.
Why the 4-Shot SideSaddle Earns Its Spot
Four rounds on the receiver is the sweet spot for a lot of hunters and home-defense setups. It keeps your reserve ammo visible, secure, and fast to grab without adding the bulk of a six-shot carrier. Pair it with the shells you already run in your Mossberg 500 and you've got a setup that's ready for whatever the day throws at it, whether that's a morning in the duck blind or a weekend burning through clays.
Key Specifications
- Manufacturer: TacStar
- Model: SideSaddle
- Manufacturer Part Number: 1081134
- UPC: 751103011348
- Model Fit: Mossberg 500
- Caliber/Gauge: 20 Gauge
- Capacity: 4 Rounds
- Mount Type: Receiver
- Shellholder Material: Corrosion-Resistant Polymer
- Backing Plate Material: Aluminum
- Color: Black
- Weight: Approx. 6 oz
- Product Type: Shotshell Carrier
- Installation: No Gunsmithing Required
What’s Included
- TacStar SideSaddle 4-shot shell carrier (polymer shellholder with aluminum backing plate)
- All mounting hardware/screws
Frequently Asked Questions
Will the TacStar SideSaddle fit my Mossberg 500 20 gauge without modifications?
Yes, this carrier is built specifically for the 20-gauge Mossberg 500 and installs directly on the receiver using the existing pin holes. No gunsmithing or drilling is required. Some field-grade shotguns may need a minor forend adjustment for clearance, but guns using a TacStar pistol grip forend fit without any changes.
How many shells does the SideSaddle hold?
It holds four 20-gauge shells in the polymer shellholder. The rounds stay snug even under recoil, so they're secure but still quick to pull when you need a reload.
What tools do I need to install the SideSaddle on my Mossberg 500?
Just a basic screwdriver in most cases. All the mounting screws come in the box, and the whole install typically takes only a few minutes. There's no need to visit a gunsmith.
Does the SideSaddle add much weight or throw off the balance of my shotgun?
Not really. The carrier weighs in around six ounces with hardware, and that's before adding shells. The aluminum backing plate keeps it rigid and flush against the receiver without noticeably affecting how the gun handles or points.






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