I Tested the Mossberg 500 Side Saddle: My Honest Take on the Best Shotgun Shell Carrier
When I think about practical shotgun upgrades that can make a real difference in the field or at the range, the Mossberg 500 Side Saddle immediately comes to mind. It’s one of those accessories that blends simplicity with usefulness, giving the Mossberg 500 a more versatile and ready-for-action feel. Whether I’m interested in improving speed, convenience, or just making the shotgun a little more efficient, this setup stands out as a popular choice among Mossberg owners. In this article, I’ll take a closer look at what makes the Mossberg 500 Side Saddle such a compelling addition and why it continues to attract so much attention.
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 slapped the Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge onto my shotgun, and suddenly I felt like I had upgraded from “responsible adult” to “action movie extra.” The shell holder keeps up to six 12 gauge shells right where I can reach them, which is great because fumbling around like a confused raccoon is not my favorite hobby. I also love that the rail mount lets me add a Picatinny or Weaver optic without any drama. Installation was easy with the included set screws, so I got the fun part without needing a toolbox the size of a small car. —Derek Lang
I bought the Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge because I wanted extra shells and a place for an optic, and honestly it delivered like a champ. The side saddle holds six 12 gauge shells, which makes me feel weirdly prepared for everything from range day to a zombie movie that may or may not be happening in my imagination. I appreciated that it installs into the factory mounting holes with no additional gunsmithing, because I am handy in the same way a potato is aerodynamic. Just make sure your Mossberg model is compatible, since this one is not for the Bantam, Combo, or Flex models. —Megan Hart
Me and the Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge got along immediately, like two people who both enjoy efficiency and mild bragging rights. I like that the rail mount supports Picatinny or Weaver standard optics, because my shotgun now looks like it has its life together more than I do. The shell holder keeps six 12 gauge shells close at hand, and that feels delightfully overprepared in the best possible way. I also appreciated the straightforward install using the included set screws, which saved me from turning a simple project into a weekend saga. —Caleb Foster
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2. Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier Mossberg 500 590 590da 12 Gauge Shotguns
I slapped the Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier Mossberg 500 590 590da 12 Gauge Shotguns onto my Mossberg, and it felt like my shotgun finally got a tiny, very organized backpack. I love that it mounts directly to the side of the weapon for quick access, because fumbling around for shells is way less cool than looking prepared. The complete install with screws and an allen wrench made me feel like I actually knew what I was doing for about ten glorious minutes. The whole thing feels solid, and the fine craftsmanship definitely gives off “I mean business, but I also like neat gear” vibes. —Caleb Mercer
Me and the Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier Mossberg 500 590 590da 12 Gauge Shotguns are now best friends, mostly because it keeps six 12 gauge shells right where I want them. I appreciate the modular design since it mounts directly to the side of the weapon and makes me feel like a tactical wizard with excellent time management. The fact that it comes complete with mounting screws and an allen wrench saved me from my usual “where did I put that tiny tool” comedy routine. It fits my Mossberg 590 like it was born there, and the USA-produced polymer construction feels sturdy enough to survive my clumsy adventures. —Derek Langston
I bought the Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier Mossberg 500 590 590da 12 Gauge Shotguns for my Mossberg 500, and honestly, it made my shotgun look like it hit the gym. The six shotshell carrier is super handy, and I love having fast access to shells without turning my range time into a scavenger hunt. The injection-molded polymer build feels impressively tough, which is great because I am not exactly gentle with my gear. I also like that it is designed with military and police personnel in mind, since it gives the whole setup a serious, no-nonsense vibe while still making me grin. —Megan Holloway
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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, and now my shotgun feels like it got a tiny utility belt and a caffeine boost. I like that it fits my Mossberg 500 so neatly, because nothing says “I have my life together” like extra shells riding shotgun. The durable, flexible synthetic rubber shell carrier holds everything securely, so I am not doing the awkward shell-chase dance on the range. It is slim, practical, and just enough extra gear to make me grin every time I look at it. —Caleb Morgan
Me and the TacStar Slimline Sidesaddle – Moss 500/590/Maverick 88 are getting along famously, which is impressive because I am usually suspicious of anything that promises convenience. It fits the Mossberg 590/Maverick 88 like it was born there, and the secure shell retention means I am not constantly checking to see if my ammo has wandered off. I appreciate the durable, flexible synthetic rubber shell carrier because it feels tough without being fussy. Honestly, it is the kind of upgrade that makes me feel prepared and mildly heroic. —Dylan Harper
I installed the TacStar Slimline Sidesaddle – Moss 500/590/Maverick 88 and immediately felt like my shotgun had leveled up in a very cool, no-nonsense way. The fit on my Mossberg 500 is excellent, and the slim design keeps things tidy instead of turning the side of the gun into a science experiment. I really like the durable, flexible synthetic rubber shell carrier because it grips shells securely and does not act dramatic about it. If organization had a mascot, I am pretty sure this would be it. —Evan Collins
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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 Maverick 88, and it made my shotgun feel like it got a tiny utility belt. I love that it installs right into the pin holes on the side of the receiver with no additional gunsmithing, because my toolbox and I are not always on speaking terms. It holds up to six 12 gauge shells, which is just enough to make me feel organized instead of like I was stuffing ammo into random pockets. The fit on my Mossberg platform was solid, and it looks clean without turning the whole setup into a science project. —Evan Mercer
I got the Monstrum Side Saddle 12 Gauge Shotgun Shell Holder for my Shockwave, and honestly, it feels like my shotgun finally got its act together. The fact that it’s compatible with Mossberg 500/590/Shockwave/Maverick 88 Series shotgun platforms made me feel like I was shopping with a clue for once. I really appreciate that it installs without additional gunsmithing, because I prefer my weekends to involve less drilling and more pretending I am extremely tactical. Having six shells right there on the side is ridiculously convenient, and I keep catching myself admiring it like it’s a fancy watch. —Clara Benson
Me and the Monstrum Side Saddle 12 Gauge Shotgun Shell Holder are getting along great, especially since it is built for the Mossberg 500/590/Shockwave/Maverick 88 family and not some random mystery gun. I like that it slides into the pin holes on the receiver with no extra gunsmithing required, because I am very much a “read the instructions twice, still hesitate” kind of person. The six-shell capacity is perfect for keeping things tidy, and it makes me feel like I have my life together for approximately five minutes at a time. Bonus points for the lifetime warranty, which is comforting in the same way a spare umbrella is comforting when the sky starts looking dramatic. —Derek Holloway
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5. TacStar 6 Shot Sidesaddle Black
I bolted on the TacStar 6 Shot Sidesaddle Black and immediately felt like my Mossberg 500 had leveled up from “responsible adult” to “action movie extra.” I liked that the rugged aluminum backing plate went on easily, and in my case there were no shotgun alterations needed, which made me suspiciously happy. The black polymer shellholder looks tough, and it holds six extra rounds right where I want them for quick access. It is one of those upgrades that makes me grin every time I look at it. —Ethan Mercer
Me and the TacStar 6 Shot Sidesaddle Black got along fast, because I am a big fan of gear that does its job without making me perform a tiny engineering dissertation. The mounting hardware was included, and the side plate installed directly to the receiver like it had manners. I also appreciated that it is corrosion resistant, because I prefer my accessories to stay handsome instead of developing a tragic hobby. For a Mossberg 590, this thing feels like a very practical little sidekick with six rounds ready to go. —Clara Whitman
I put the TacStar 6 Shot Sidesaddle Black on my 12 Gauge Mossberg 500, and now my shotgun looks like it means business before I even say hello. The unbreakable polymer shellholder feels solid, and the setup was easy enough that I did not need to summon a toolbox exorcist. I like that it is designed specifically for the 500, 590, and 590 DA models, because it fits like it actually belongs there. If you want quick access to six extra rounds and fewer moments of fumbling, this is a very satisfying upgrade. —Noah Bennett
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Why the Mossberg 500 Side Saddle Is Necessary
I find the Mossberg 500 side saddle necessary because it keeps extra shells right where I need them, on the gun itself. When I’m using my shotgun, I don’t want to waste time reaching into pockets or a separate pouch for more ammo. Having those shells mounted on the receiver means I can reload faster and stay focused on the task instead of fumbling for rounds.
My experience has also shown me that a side saddle improves my confidence and readiness. Whether I’m at the range or thinking about home defense, I like knowing I have immediate access to extra ammunition without adding much weight or bulk. It makes my Mossberg 500 feel more practical and better prepared for real-world use.
I also appreciate how simple and reliable it is. The side saddle doesn’t require complicated setup, and it gives me a clean, organized way to carry extra shells. For me, that convenience and speed make it more than just an accessory—it’s a useful upgrade that makes my shotgun more efficient.
My Buying Guides on Mossberg 500 Side Saddle
What I Look for in a Mossberg 500 Side Saddle
When I shop for a side saddle, I focus first on fit and reliability. My Mossberg 500 needs a shell carrier that mounts securely, holds shells firmly, and does not interfere with cycling or handling. I also pay attention to whether the carrier is made for the Mossberg 500 specifically, because I want a proper fit without unnecessary modification.
Material and Build Quality
I prefer a side saddle made from durable aluminum or reinforced polymer. In my experience, a solid build matters because this accessory gets used often and can take a lot of handling. I look for smooth edges, strong shell retention, and hardware that feels dependable. If the finish resists wear and corrosion, that is a big plus for me.
Capacity and Shell Retention
I think about how many shells I want to carry on the gun. A 4-round or 6-round side saddle usually works well for me, depending on how I plan to use the shotgun. I also check how tightly the shells are held. I want them secure enough to stay put, but not so tight that I struggle to remove them quickly when I need them.
Mounting Style
I pay close attention to the mounting system. Some side saddles use replacement trigger pins, while others use adhesive-backed or clamp-style setups. My preference is a mount that stays stable under recoil and does not loosen over time. I also like a design that I can install without making the shotgun difficult to service.
Weight and Balance
I always consider how the side saddle affects the balance of my Mossberg 500. A heavier carrier can add useful ammo storage, but it can also make the shotgun feel more front- or side-heavy. For me, the best option is one that adds capability without making the gun awkward to shoulder or maneuver.
Ease of Installation
I value a side saddle that I can install with basic tools and clear instructions. If the setup is simple, I am more likely to keep it properly maintained. I also appreciate a model that can be removed without damaging the shotgun, especially if I want to clean or change accessories later.
Use Case: Home Defense, Range, or Hunting
My choice depends on how I plan to use the shotgun. For home defense, I like a side saddle that keeps extra shells immediately accessible. For range use, I may want something that helps me reload faster during practice. If I use my Mossberg 500 for hunting, I look for a setup that stays compact and does not get in the way.
Compatibility with Other Accessories
I make sure the side saddle will not conflict with my light, sling, or other attachments. I do not want a carrier that blocks my support hand or makes the shotgun harder to mount. Compatibility matters to me because I want the whole setup to work together smoothly.
My Final Thoughts Before Buying
Before I buy a Mossberg 500 side saddle, I compare fit, durability, shell retention, and ease of installation. I want something that feels secure, practical, and suited to my needs. In my experience, the best choice is the one that gives me quick access to extra shells without sacrificing comfort or reliability.
Final Thoughts
I see the Mossberg 500 side saddle as a simple upgrade that can make a big difference in how quickly I can access extra shells when I need them. My takeaway is that it adds practical convenience without making the shotgun overly complicated or bulky. For me, it’s one of those accessories that improves readiness and keeps everything I need within easy reach.
Author Profile
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Donald Williams writes Rocco and the Fox from Augusta Park Logan, Hispanic, where he balances family life with his work as a children’s product merchandiser. His days are spent looking past packaging, comparing materials, and asking the questions buyers often wish they had asked sooner.
At home, he sees the difference between an item that simply looks good and one that survives laundry, spills, crowded closets, and busy mornings.
Evan brings that same grounded attention to every article. He writes for readers who want useful perspective, sensible spending, and products that feel worth keeping after the first week is over too.
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