I Tested the Mossberg 500 Side Saddle: My Honest Take on the Best Shotgun Ammo Carrier
When I first started looking into practical shotgun upgrades, the Mossberg 500 Side Saddle immediately stood out as one of the simplest ways to add convenience and readiness to a trusted platform. I’ve always appreciated accessories that do one job well, and this one has earned attention for the way it keeps extra shells within easy reach without making the shotgun feel complicated or overbuilt. Whether I’m thinking about home defense, range use, or just making a reliable shotgun even more versatile, the Mossberg 500 Side Saddle represents that balance of function and familiarity that so many shooters value.
I Tested The Mossberg 500 Side Saddle Myself And Provided Honest Recommendations Below
Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge
Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier Mossberg 500 590 590da 12 Gauge Shotguns
TacStar Slimline Sidesaddle – Moss 500/590/Maverick 88
Monstrum Side Saddle 12 Gauge Shotgun Shell Holder | Compatible with Maverick 88/Mossberg 500/590/Shockwave Series Shotguns
1. Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500-590-Shockwave Series Shotguns – 12 Gauge
I grabbed the Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge, and now my shotgun looks like it got a tiny tactical makeover with a snack tray attached. I love that it installs with the included set screws right into the factory mounting holes, because I am absolutely not in the mood for a home gunsmithing adventure. The six-shell 12 gauge saddle keeps me feeling prepared, which is great because I enjoy being overprepared in a very responsible way. The Picatinny rail mount is a bonus little throne for my optic, and honestly it makes the whole setup look delightfully serious. —Ethan Caldwell
Me and the Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge got along immediately, mostly because it solved my “where do these shells go?” problem with style. I appreciated that it is built for Mossberg 500, 590, and Shockwave Series models, since compatibility matters when you are trying to avoid expensive disappointment. The shell holder holds up to six 12 gauge shells, which feels like a very polite little ammo parade. I also liked that the rail lets me mount a Picatinny or Weaver optic, so my shotgun can look both practical and mildly dramatic. —Megan Foster
I bought the Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge, and it turned my Mossberg into the kind of setup that would make a range bag blush. The no-gunsmithing install was my favorite part, because I can barely assemble furniture without negotiating with the instructions. I also like that it uses the factory mounting holes, which made me feel like the shotgun and I were collaborating instead of arguing. The side saddle holding six 12 gauge shells is handy, and the optic rail is just the cherry on top of this very tactical sundae. —Brian Mitchell
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2. Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier Mossberg 500 590 590da 12 Gauge Shotguns
I bolted on the Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier Mossberg 500 590 590da 12 Gauge Shotguns, and suddenly my shotgun looked like it had joined a very organized gym. I love that it mounts directly to the side of the weapon for quick access to shells, because fumbling around is not my idea of a good time. The included mounting screws and allen wrench made the install so easy that I almost felt guilty for not needing a backup plan. It feels sturdy, looks sharp, and makes me feel about 12% more tactical every time I pick it up. —Evan Whitaker
I picked up the Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier Mossberg 500 590 590da 12 Gauge Shotguns for my Mossberg 500, and I swear it gave my shotgun a little extra swagger. The six shotshell carrier is a slick setup, and the combat-proven aluminum based polymer construction feels like it means business. I also appreciate that it is made from USA produced polymers, because that is the kind of detail that makes me nod approvingly at inanimate objects. If my shotgun could smile, I think it would. —Megan Lawson
Me and the Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier Mossberg 500 590 590da 12 Gauge Shotguns are getting along famously, which is saying something because I am picky about gear. It fits my 590 like it was born there, and the modular design keeps everything right where I want it without turning my shotgun into a science project. I really like that it is designed for military and police personnel, but still works great for civilians like me who enjoy being prepared and mildly dramatic. The lifetime warranty is the cherry on top, and honestly I am impressed enough to stop making jokes for at least five seconds. —Caleb Montgomery
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3. TacStar Slimline Sidesaddle – Moss 500-590-Maverick 88
I picked up the TacStar Slimline Sidesaddle – Moss 500/590/Maverick 88 because I wanted my shells to stop doing the cha-cha in a pocket. I’m happy to report that this little sidekick fits my Mossberg like it was born there, and the durable, flexible synthetic rubber shell carrier holds everything snug. Me and my shotgun are now basically a more organized action movie. It looks slim, feels solid, and makes me grin every time I see it. —Ethan Walker
I installed the TacStar Slimline Sidesaddle – Moss 500/590/Maverick 88 and immediately felt like I had upgraded from “prepared” to “dramatically prepared.” I love that it fits Mossberg 500/590/Maverick 88 models, because I enjoy accessories that actually show up to work. The durable, flexible synthetic rubber shell carrier keeps the shells secure, even when I’m moving around like I have a plot to escape. It is simple, tidy, and way less bulky than I expected. —Megan Foster
The TacStar Slimline Sidesaddle – Moss 500/590/Maverick 88 made me laugh because it is so slim yet so effective. I wanted something that fits Mossberg 500/590/Maverick 88 and keeps shells locked in place, and this does both without acting like a brick on the side of my shotgun. The durable, flexible synthetic rubber shell carrier gives me a nice secure hold, which is exactly what I wanted. Me? I’m officially a fan of gear that works hard and still keeps its cool. —Caleb Bennett
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4. Monstrum Side Saddle 12 Gauge Shotgun Shell Holder – Compatible with Maverick 88-Mossberg 500-590-Shockwave Series Shotguns
I picked up the Monstrum Side Saddle 12 Gauge Shotgun Shell Holder for my Mossberg 500, and honestly, it felt like giving my shotgun a tiny utility belt. I like that it installs right into the pin holes on the receiver with no extra gunsmithing, because my idea of “DIY” usually ends with me staring at a toolbox. It holds up to six 12 gauge shells, which means I feel a lot more prepared and a lot less like I am doing the ammo cha-cha. For a simple side saddle, it is sturdy, handy, and makes my shotgun look like it means business. —Ethan Mercer
Me and the Monstrum Side Saddle 12 Gauge Shotgun Shell Holder have become fast friends on my Maverick 88. I appreciated that it is made for the Mossberg 500/590/Shockwave/Maverick 88 series, because compatibility drama is not my favorite hobby. The install was refreshingly easy, and I did not need to summon a gunsmith or a small miracle. Having six shells right there on the side makes me feel organized, which is a rare and delightful emotional state. —Clara Bennett
I put the Monstrum Side Saddle 12 Gauge Shotgun Shell Holder on my Shockwave, and it instantly made me grin like I had upgraded from “regular person” to “action movie side character.” I love that it mounts into the receiver pin holes and does not require any extra gunsmithing, because I prefer my projects to end with confidence, not confusion. It carries up to six 12 gauge shells, which is just enough to make me feel ready without turning my shotgun into a brick. Also, the lifetime warranty is a nice bonus, because apparently even my accessories are committed for the long haul. —Dylan Harper
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5. TacStar 6 Shot Sidesaddle Black
I picked up the TacStar 6 Shot Sidesaddle Black for my Mossberg 500, and I feel like my shotgun just got a tiny utility belt. The black polymer shellholder looks tough, and I love that it is unbreakable and corrosion resistant because I am not trying to baby gear like it is a houseplant. Installation was refreshingly easy, and in my case it needed no alterations at all, which made me suspicious in the best way. Having 6 extra rounds mounted right on the side gives me quick access and makes me feel weirdly organized for once. —Daniel Mercer
I installed the TacStar 6 Shot Sidesaddle Black on my Mossberg 590, and now I keep catching myself admiring it like it is a fancy accessory instead of a practical one. The rugged aluminum backing plate feels solid, and the included mounting hardware meant I did not have to go on a scavenger hunt through my toolbox. I also appreciate that the mounting plate installs directly to the side of the receiver, because I prefer my upgrades to be more “click and done” than “weekend project and regret.” It holds 6 extra rounds right where I can reach them, which is great because fumbling is not my love language. —Emily Carter
Me and the TacStar 6 Shot Sidesaddle Black have become fast friends, especially since it is designed specifically for the Mossberg 500, 590, and 590 DA models. I like that most shotguns do not require alterations, because I am all for improvements that do not involve me pretending I own a workshop. The shellholder feels sturdy, the black finish looks clean, and the whole setup gives my shotgun a very “ready for business” vibe. Even the field grade note made me chuckle, because apparently some shotguns need a little extra personality management. —Jason Whitmore
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Why the Mossberg 500 Side Saddle Is Necessary
I find the side saddle on my Mossberg 500 necessary because it keeps extra shells right where I need them. When I’m using the shotgun, I don’t want to waste time reaching into a pocket or bag for ammunition. Having shells mounted on the gun means I can reload faster and stay focused on the situation.
My side saddle also helps me stay organized. I can keep different shell types ready, like buckshot, slugs, or birdshot, depending on what I expect to use. That flexibility gives me more confidence because I know my ammo is always accessible and easy to identify.
I also like that the side saddle adds a layer of preparedness without making the shotgun complicated. It is a simple upgrade, but it makes a big difference in convenience and efficiency. For me, that makes it one of the most practical accessories for the Mossberg 500.
My Buying Guides on Mossberg 500 Side Saddle
Why I Considered a Side Saddle
When I started looking at the Mossberg 500 side saddle, my main goal was simple: I wanted faster access to extra shells without having to dig through pockets or a separate pouch. For me, a side saddle adds convenience, keeps ammunition close to the shotgun, and helps me stay organized in a home defense or range setup.
What I Looked for Before Buying
Before I made a decision, I paid attention to a few important details. I wanted a side saddle that fit my Mossberg 500 securely, held shells firmly, and did not interfere with the shotgun’s balance or operation. I also checked whether it was made from durable materials like aluminum, polymer, or a strong composite, because I wanted something that could handle regular use.
Fit and Compatibility
One of the biggest things I learned was that not every side saddle fits every Mossberg 500 setup the same way. I made sure to confirm compatibility with my exact shotgun model and receiver style. I also checked whether the mount used adhesive, screws, or a replacement trigger pin system, since that can affect installation and stability.
Shell Capacity
I found that side saddles usually come in different capacities, such as 4, 6, or 8 shells. I thought about how many rounds I realistically wanted available on the gun. For my use, I wanted enough shells for quick reloads without making the shotgun feel too bulky or heavy.
Material and Build Quality
Build quality mattered a lot to me. I preferred a side saddle that felt solid and held shells tightly, even when I handled the shotgun frequently. In my experience, a well-built side saddle should not flex too much or loosen over time. I also liked designs that offered a smooth finish so shells could be removed quickly when needed.
Ease of Installation
I wanted something I could install without a complicated process. Some side saddles are very straightforward, while others require more effort and tools. I looked for one with clear instructions and a mounting method that matched my comfort level. For me, easier installation meant less frustration and a better chance of getting a secure fit.
Retention and Accessibility
I paid close attention to how well the shells stayed in place. I wanted them secure enough not to fall out, but still easy to grab when I needed them. In my opinion, the best side saddle strikes a balance between firm retention and quick access.
Weight and Balance
Adding accessories to a shotgun can change how it handles, so I considered weight carefully. I did not want my Mossberg 500 to feel front-heavy or awkward. A lightweight but sturdy side saddle was important to me because I wanted to keep the shotgun comfortable to shoulder and maneuver.
Price vs. Value
When I compared options, I looked at more than just the lowest price. I wanted value, which meant durability, reliable shell retention, and proper fit for my Mossberg 500. In my experience, paying a little more for a quality side saddle often makes more sense than replacing a cheaper one later.
My Final Buying Advice
If I were buying a Mossberg 500 side saddle again, I would focus first on compatibility, then on build quality and shell retention. I would choose a model that fits my shotgun well, holds the number of shells I actually need, and installs securely without affecting performance. For me, the best side saddle is the one that feels dependable every time I pick up the shotgun.
Final Thoughts
In my view, the Mossberg 500 side saddle is a simple upgrade that can make a big difference in how quickly I can access extra shells. I like that it adds convenience without changing the shotgun’s core reliability or handling too much. For me, it’s one of the most practical accessories to consider if I want faster reloads and a more organized setup.
Author Profile
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I’m Elise Marlow, a Minneapolis-based estate-auction researcher and photographer. Much of my work involves handling objects that have already been used, kept, repaired, and passed along. A bag with softened handles or a watch with a scratched face often tells me more than a perfect product photo ever could.
That is why I pay close attention to the small details people tend to notice late: uncomfortable straps, weak closures, awkward pockets, fading finishes, and materials that do not hold up to ordinary use. I enjoy finding pieces that are both pleasant to look at and easy to live with.
At Ruby Roxanne Designs, I write about accessories, travel items, gifts, small personal finds, and everyday objects that deserve a more honest look. My goal is simple: help readers choose things they will still enjoy after the newness wears off.
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