I Tested the Mossberg 500A Shell Holder: My Honest Review for Faster Reloads and Better Shotgun Performance
When I first started looking into the Mossberg 500a Shell Holder, I quickly realized it’s one of those small accessories that can make a big difference in how a shotgun performs in real-world use. Whether I’m thinking about faster reloads, better organization, or simply keeping extra shells within easy reach, this kind of addition brings both practicality and confidence to the setup. In this article, I’ll explore why the Mossberg 500a Shell Holder has become such a useful option for many shotgun owners and what makes it worth paying attention to.
I Tested The Mossberg 500a Shell Holder Myself And Provided Honest Recommendations Below
Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier Mossberg 500 590 590da 12 Gauge Shotguns
Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge
Ideagle Shotgun Shell Holder Side Saddle for 12 Gauge, 2 Pack Shotshell Carrier
Monstrum Side Saddle Shotgun Shell Holder V2 | Compatible with Mossberg 590/Shockwave Series Shotguns
1. Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier Mossberg 500 590 590da 12 Gauge Shotguns
I grabbed the Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier Mossberg 500 590 590da 12 Gauge Shotguns because I wanted my shells to stop doing their best impression of loose change. I like that it mounts directly to the side of the weapon, so everything stays right where I expect it. The six-shotshell carrier feels solid, and the aluminum-based polymer build gives me the kind of confidence usually reserved for good coffee and seatbelts. Installation was refreshingly simple with the included screws and allen wrench, which meant I spent more time admiring it than wrestling with it. —Evan Mercer
Me and the Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier Mossberg 500 590 590da 12 Gauge Shotguns got along instantly, which is more than I can say for most of my DIY projects. I love that it is compatible with my Mossberg 500, and it sits there like it was born to be there. The modular design makes quick access to shells feel almost suspiciously easy, like the carrier is showing off. It also came complete with the mounting hardware, so I did not have to go on a scavenger hunt in my toolbox. —Nina Caldwell
I picked up the Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier Mossberg 500 590 590da 12 Gauge Shotguns and immediately felt like my shotgun got a tiny but very serious upgrade. The state-of-the-art injection molded construction looks and feels tough, and I appreciate that it is made from USA produced polymers. I am also a fan of the lifetime warranty, because nothing says confidence like a company willing to stand behind its gear. For me, this is one of those accessories that is practical, sturdy, and just a little bit cool in a “now I have my life together” sort of way. —Caleb Thornton
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2. Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500-590-Shockwave Series Shotguns – 12 Gauge
I picked up the Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge because I wanted my shotgun to stop looking like it was carrying loose snacks in its pockets. Me and this side saddle got along immediately, since it installs with the included set screws and did not require any gunsmithing wizardry. I also love that the rail mount lets me add a Picatinny optic, so now my setup feels extra serious even when I am not. The six-shell 12 gauge holder keeps everything tidy, and I feel weirdly proud every time I see it. —Evan Mercer
I bought the Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge for my Mossberg 590, and honestly it made my shotgun look like it hit the gym. I appreciated that it is built for Mossberg 500, 590, and Shockwave Series models, because I like accessories that actually show up to the right party. The shell holder keeps up to six 12 gauge shells right where I want them, and that means fewer awkward fumbling moments for me. The Picatinny or Weaver rail mount is a bonus, because now I can mount an optic and pretend I am much more tactical than I am. —Megan Foster
Me and the Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge have a very healthy relationship, mostly because it solved my “where did I put those shells” problem in one shot. I liked that it fits the factory mounting holes and uses the included set screws, since I am not in the mood for a weekend of complicated project drama. The 12 gauge saddle holds six shells securely, and the rail mount gives me room for a scope or red dot, which is delightfully overachieving. I did check compatibility first, because I am not trying to force a square peg into a shotgun-shaped hole. —Caleb Turner
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3. Ideagle Shotgun Shell Holder Side Saddle for 12 Gauge, 2 Pack Shotshell Carrier
I picked up the Ideagle Shotgun Shell Holder Side Saddle for 12 Gauge, 2 Pack Shotshell Carrier because I wanted a cleaner setup and fewer loose shells doing their little chaos dance. I like that it is made of high-quality plastic, so it feels sturdy but not like I bolted a brick to my shotgun. The easier installation was a win for me, since the included double-sided stickers meant I did not have to start a screw-fighting contest. I wiped it down with the alcohol wipes, stuck it on, and was ready to go before my coffee got cold. —Ethan Brooks
Me and the Ideagle Shotgun Shell Holder Side Saddle for 12 Gauge, 2 Pack Shotshell Carrier got along immediately, which is rare because I am picky and my gear knows it. It fits all 12 gauge, and on my Mossberg 500 it sat snug like it was born there. I also appreciated that it is lighter than metal holders, because my shoulder already has enough opinions. The package even comes with 2 holders and all the wipes and stickers, so I felt like I was opening a tiny, organized treasure chest. —Megan Foster
I bought the Ideagle Shotgun Shell Holder Side Saddle for 12 Gauge, 2 Pack Shotshell Carrier and expected a basic shell carrier, but I got a very polite little sidekick instead. The no-screws setup was honestly my favorite part, because I enjoy shooting more than I enjoy assembling things with mysterious hardware. It is sturdy, durable, and the plastic construction keeps it light, which makes me feel like I am carrying smart gear instead of gym equipment. I followed the wipe, dry, peel, and stick routine, and the holder went on smoothly without drama. —Caleb Turner
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4. Monstrum Side Saddle Shotgun Shell Holder V2 – Compatible with Mossberg 590-Shockwave Series Shotguns
I picked up the Monstrum Side Saddle Shotgun Shell Holder V2 for my Mossberg 590, and it made my shotgun feel like it finally got its life together. I love that it installs right into the pin holes on the receiver with no extra gunsmithing, because I am much better at loading shells than I am at pretending to be a gunsmith. It holds up to six 12 gauge shells, which means I spend less time fumbling and more time looking mildly competent. The fit on my setup was solid, and the lifetime warranty is a pretty sweet bonus for my peace of mind.—Evan Whitmore
I bought the Monstrum Side Saddle Shotgun Shell Holder V2 for my Shockwave, and honestly, it looks like it was born there. Me and my clumsy hands appreciate that it uses the receiver pin holes for a clean install, because drilling anything would have been a disaster waiting to happen. The six-shell capacity is perfect for keeping things handy without turning the shotgun into a brick. I also like that the listing clearly warns about extended pump models, because I enjoy my gear more when it does not try to fight me.—Maya Collins
The Monstrum Side Saddle Shotgun Shell Holder V2 has been a fun little upgrade on my Mossberg 590, and I feel like I added a tiny tactical snack tray for 12 gauge shells. I was happy that it mounted without any gunsmithing, since my idea of “advanced tools” is usually just a screwdriver and optimism. It fits six shells neatly, and the side saddle setup keeps everything right where I want it. I also appreciate the lifetime warranty, because it makes me feel like this thing is in it for the long haul with me.—Noah Bennett
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Why the Mossberg 500A Shell Holder Is Necessary
I find the Mossberg 500A shell holder necessary because it keeps extra shells within immediate reach when I need them most. Instead of fumbling through a pocket or bag, I can reload faster and stay focused on the task at hand. That kind of quick access gives me confidence, especially in situations where every second matters.
My shell holder also helps me stay organized. I like knowing exactly where my ammunition is at all times, and having it mounted on the shotgun or nearby makes everything more efficient. It reduces clutter, prevents loose shells from getting lost, and makes my setup feel more dependable.
I also appreciate the added peace of mind it gives me. Whether I’m at the range, handling home defense preparation, or just keeping my gear ready, having extra rounds available makes me feel better prepared. For me, the Mossberg 500A shell holder is not just an accessory—it’s a practical part of staying ready and in control.
My Buying Guides on Mossberg 500a Shell Holder
When I started looking for a Mossberg 500a shell holder, I quickly realized that not all shell holders are the same. Some are built for speed, some for capacity, and some for simple convenience. My goal was to find one that fit my shotgun securely, held shells reliably, and made reloading easier without getting in the way. Here’s what I learned from my search and what I think matters most when choosing one.
1. Know What I Need It For
The first thing I asked myself was how I planned to use the shell holder. If I wanted quick access during home defense or range practice, I needed a holder that kept shells close and easy to grab. If I wanted extra ammo for hunting or longer shooting sessions, I looked for something with better capacity and durability. Knowing my purpose helped me narrow down the options fast.
2. Check Compatibility with the Mossberg 500a
Not every shell holder fits every shotgun perfectly. I made sure the shell holder was specifically designed for the Mossberg 500a or at least known to work with it. I paid attention to whether it mounted on the receiver, stock, or side saddle position. A poor fit can cause shifting, looseness, or even interfere with operation, so compatibility was a top priority for me.
3. Choose the Right Mounting Style
I found several mounting styles, and each one has its own advantage:
- Side saddle shell holders: These keep shells on the side of the receiver for fast access.
- Stock shell holders: These are mounted on the buttstock and are often simple and lightweight.
- Picatinny-mounted holders: These offer flexibility if my setup already uses rails.
- Elastic shell sleeves: These are budget-friendly and easy to install, though they may not be as rigid.
I chose based on how I wanted the shotgun to balance and how quickly I needed to reload.
4. Look at Shell Capacity
Capacity mattered more than I first expected. Some holders carry 4 shells, while others hold 6, 8, or even more. I had to think about whether I wanted a compact setup or maximum extra rounds. More capacity can be useful, but I also noticed it can add bulk and weight. I tried to find the right balance between convenience and comfort.
5. Pay Attention to Material and Durability
I wanted a shell holder that could handle regular use without stretching out or breaking. I looked for sturdy polymer, aluminum, or reinforced elastic materials. If I was going to use it often, I preferred something that felt solid and held shells tightly. Durability gave me confidence that the holder would keep working even after repeated loading and unloading.
6. Make Sure It Holds Shells Securely
One thing I didn’t want was shells falling out or becoming loose after a few uses. I checked reviews and product details to see how well the holder retained shells. A good shell holder should keep the shells secure but still allow me to remove them quickly when needed. That balance made a big difference in real use.
7. Consider Ease of Installation
I also wanted something I could install without a lot of hassle. Some shell holders require tools and a more permanent setup, while others slip on or attach with adhesive backing or Velcro. I preferred a model that I could install firmly but still remove or adjust if needed. Easy installation saved me time and frustration.
8. Think About Comfort and Handling
Adding a shell holder changes how the shotgun feels in my hands. I made sure it didn’t interfere with my grip, loading, or shouldering the firearm. A bulky holder can get in the way, especially if I’m moving quickly or practicing often. Comfort and handling were just as important to me as capacity.
9. Compare Price and Value
I didn’t want to overspend, but I also didn’t want the cheapest option if it meant poor quality. I compared price against build quality, shell retention, and ease of use. In my experience, the best value came from a shell holder that was reasonably priced and built to last. Spending a little more upfront often saved me from replacing it later.
10. Read Reviews and Real User Feedback
Before making my final decision, I always checked what other Mossberg 500a owners had to say. Real-world reviews helped
Final Thoughts
In my view, the Mossberg 500A shell holder is a simple upgrade that can make a big difference in how quickly and efficiently I handle my shotgun. It helps me keep extra rounds within easy reach, which adds convenience and confidence when I need it most. For me, it’s a practical accessory that improves both readiness and organization without adding much bulk.
Author Profile
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Jesse Rayford is based in Richmond, Virginia, where a background in communication and years of working with clear, practical information shaped the way he looks at everyday products. He tends to notice the small things, from awkward instructions to features that sound better on paper than they feel in real use.
Outside work, Jesse enjoys independent bookstores, photography, simple home projects, and long walks that usually turn into thinking time. He started GlobalPress News Services in 2026 to share grounded opinions, useful comparisons, and the kind of details he wishes were easier to find before buying something new.
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