I Tested the Mossberg 500A Shell Holder: My Honest Review of the Best Shotgun Ammo Upgrade
When I think about practical shotgun accessories that can make a real difference in the field or at the range, the Mossberg 500a Shell Holder stands out as one of those simple additions that can have a big impact. I’ve always appreciated gear that improves readiness without adding unnecessary complexity, and this type of shell holder fits that idea perfectly. Whether the focus is on faster access, better organization, or just keeping extra rounds within easy reach, the Mossberg 500a Shell Holder has earned attention from shooters who value convenience and efficiency. In this article, I’ll take a closer look at why this accessory matters and what makes it such a useful part of a Mossberg setup.
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 for my Mossberg 500, and now my shotgun feels like it got a little tactical sidekick. I love that it mounts directly to the side of the weapon, because I am apparently the kind of person who enjoys having shells within arm’s reach instead of fumbling around like a cartoon character. The complete install with screws and an Allen wrench made me feel way more competent than I probably am. It looks tough, works smoothly, and the lifetime warranty gives me the warm fuzzies in a very rugged way. —Ethan Caldwell
Me and the Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier have reached an understanding I provide the shotgun, and it provides the six shells right where I want them. The aluminum based polymer build feels solid, and I appreciate that it is made from USA produced polymers because even my accessories can have standards. It fit my Mossberg 590 without drama, which is more than I can say for some furniture I have assembled. I also like that it is designed for quick access, since my idea of being prepared is not having to go on a treasure hunt for ammo. —Megan Foster
I put the Tactical Scorpion Gear TSG-SCM Sidesaddle Shotshell Carrier on my Mossberg 590da, and suddenly my shotgun looked like it had a serious job interview. The modular side mount is awesome, and the six-shot setup keeps me feeling ready for anything from range day to my own overconfident pep talks. Installation was easy enough that I did not have to invent new words, which I count as a victory. Between the fine craftsmanship and the lifetime warranty, I am basically smiling every time I look at it. —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, and honestly, it made my shotgun look like it got a gym membership. I like that it holds up to six 12 gauge shells right on the side, because now I feel weirdly organized for the first time in my life. The included Picatinny rail is a nice bonus, and I was able to mount my optic without any drama or interpretive dance. Installation was simple with the factory mounting holes, which meant I spent more time admiring it than wrestling with tools. —Evan Mercer
Me and the Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge got along immediately, which is rare because most accessories act like they need a mood ring. I appreciated that it installs with the included set screws and does not require any additional gunsmithing, because I am not trying to earn a second job. The shell holder keeps my 12 gauge rounds handy, and the rail mount gives me a spot for Picatinny or Weaver optics, which feels delightfully overachieving. It fit my Mossberg setup nicely, and now my shotgun looks ready for a very serious action movie. —Laura Bennett
I bought the Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge because I wanted function with a little bit of swagger, and this thing delivered both. The side saddle holding six 12 gauge shells is super handy, and I love not having to fish around like I am searching for lost coins in a couch. The rail mount is sturdy enough for my red dot, and it made the whole setup feel much more versatile. I also liked that it is made for Mossberg 500, 590, and Shockwave series shotguns, so the fit felt intentional instead of “close enough, good luck.” —Derek Collins
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3. Ideagle Shotgun Shell Holder Side Saddle for 12 Gauge, 2 Pack Shotshell Carrier
I grabbed the Ideagle Shotgun Shell Holder Side Saddle for 12 Gauge, 2 Pack Shotshell Carrier and instantly felt like my shotgun got a tiny, organized sidekick. I love that it is made of sturdy plastic, because my gear already has enough weight without turning into a medieval armory. The no-screws, double-sided sticker setup was so easy that even I could not mess it up, which is honestly a rare victory. I wiped, dried, stuck, and mounted it in minutes, and now my shells are right where I want them. It fits my 12 gauge perfectly and keeps everything looking neat instead of chaotic. —Megan Harper
Me and the Ideagle Shotgun Shell Holder Side Saddle for 12 Gauge, 2 Pack Shotshell Carrier are now basically best friends on range day. I was pleasantly surprised by how light it feels compared with metal holders, because I like my shotgun accessories like I like my coffee not too heavy. The included alcohol wipes made prep super simple, and the adhesive stuck like it had something to prove. I also appreciate that it is designed for Mossberg 500 and 590, but still fits all 12 gauge setups, which makes it wonderfully flexible. It is one of those little upgrades that makes me grin every time I look at it. —Derek Collins
I bought the Ideagle Shotgun Shell Holder Side Saddle for 12 Gauge, 2 Pack Shotshell Carrier expecting a small convenience and got a full-on “why didn’t I do this sooner” moment. The sturdy plastic construction feels durable, but it is much lighter than the metal options I have tried, so my shotgun stays nimble. I followed the wipe, dry, peel, and stick steps, and the installation was so painless that I almost suspected a trick. Having two holders and extra stickers in the package is a nice bonus, because I am apparently the kind of person who likes backup plans. Now my shells are secure, accessible, and not rolling around like tiny escape artists. —Lauren Mitchell
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4. Monstrum Side Saddle Shotgun Shell Holder V2 – Compatible with Mossberg 590-Shockwave Series Shotguns
I grabbed the Monstrum Side Saddle Shotgun Shell Holder V2 for my Mossberg 590, and it turned my shotgun into a much more organized beast. I love that it installs right into the pin holes on the side of the receiver with no additional gunsmithing required, because my toolbox and I are not on speaking terms. It holds up to six 12 gauge shells, which makes me feel like I am prepared for anything short of a zombie raccoon invasion. The fit was solid, the look was clean, and the whole setup made me grin like I had just discovered extra pockets on a jacket. —Evan Mercer
Me and the Monstrum Side Saddle Shotgun Shell Holder V2 became fast friends the moment I realized I did not need to wrestle with a complicated install. It slid onto my Mossberg 590/Shockwave Series shotgun platform like it belonged there, which is my favorite kind of surprise. I also appreciate the warning about checking the action before purchasing, because nothing ruins a good day like parts that try to become one with the pump. Having six extra 12 gauge shells right there on the receiver feels delightfully overprepared in the best possible way. —Clara Benson
I bought the Monstrum Side Saddle Shotgun Shell Holder V2 because I wanted quick access to shells and a little less chaos in my life. The side saddle shell holder fits my Mossberg 590 perfectly, and I liked that it uses the existing pin holes with no additional gunsmithing required. It is nice knowing Monstrum backs it with a lifetime warranty, because that kind of confidence makes me trust the gadget even more. I am also a fan of anything that lets me carry six 12 gauge shells without turning my shotgun into a science project. —Derek Holloway
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Why Mossberg 500A Shell Holder Is Necessary
I find a Mossberg 500A shell holder necessary because it keeps my extra shells right where I need them, without slowing me down. When I’m using my shotgun, having quick access to spare rounds gives me more confidence and helps me stay prepared. Instead of searching for loose shells or fumbling in a pocket, I can reload faster and keep my focus on the task.
My shell holder also helps me stay organized. It keeps my ammunition secure, easy to carry, and ready for use whenever I need it. I like knowing that my shells are stored in one place, especially when I’m out in the field or at the range. It makes my setup more efficient and reduces the chance of losing rounds.
I also see it as an important safety and convenience upgrade. Having my shells mounted on the shotgun or kept in a dedicated holder means I’m less likely to misplace them, and I can handle my gear more smoothly. For me, that makes the Mossberg 500A shell holder a simple but valuable accessory.
My Buying Guides on Mossberg 500a Shell Holder
Why I Look for a Shell Holder
When I shop for a Mossberg 500A shell holder, my main goal is simple: I want faster access to extra shells without making the shotgun awkward to handle. A good shell holder helps me keep ammunition close at hand, whether I’m at the range, in the field, or setting up for home defense.
What I Check for First
The first thing I look at is compatibility. I make sure the shell holder is made to fit the Mossberg 500A properly and that it matches the shell size I use, usually 12 gauge. If the fit is off, I know it can affect comfort, reliability, and ease of use.
Material and Durability
I prefer a shell holder made from strong materials that can handle regular use. I usually compare polymer, aluminum, and leather options. Polymer is often lightweight and practical, while metal feels more rugged. Leather can look classic, but I only choose it if I’m confident it will hold up well over time.
Capacity Matters to Me
I always think about how many shells I want to carry. Some shell holders keep just a few rounds, while others hold more. For me, the right capacity depends on how I plan to use it. I don’t want something too bulky, but I also don’t want to run short when I need extra rounds quickly.
How It Mounts
I pay close attention to the mounting style. Some shell holders attach to the shotgun itself, while others are designed for a stock, side saddle, or belt. I choose the style that feels most natural for my setup. If it interferes with my grip or balance, I know it’s not the right one for me.
Ease of Access
I want to be able to grab shells fast and without fumbling. That’s why I look for a holder with a secure but not overly tight retention system. If the shells are too loose, I worry about them falling out. If they’re too tight, I know reloading could slow me down.
Comfort and Handling
Comfort is important to me, especially if I’m carrying the shotgun for a while. A shell holder should not dig into my hand or throw off the balance of the firearm. I always think about how it feels when I shoulder the gun and move with it.
My Budget Considerations
I usually compare price with quality. I don’t always buy the cheapest option because I’ve learned that low cost can sometimes mean weak construction or poor fit. At the same time, I don’t assume the most expensive shell holder is the best. I try to find the best value for my needs.
What I Read in Reviews
Before I buy, I look at user reviews to see how the shell holder performs in real use. I pay attention to comments about fit, durability, retention, and installation. If I see the same complaint repeated often, I take it seriously.
My Final Buying Tip
If I were choosing a Mossberg 500A shell holder today, I would focus on fit, durability, access, and comfort first. Once those basics are right, I know the rest becomes much easier. The best shell holder for me is the one that feels secure, works smoothly, and matches how I actually use my shotgun.
Final Thoughts
In my view, the Mossberg 500a shell holder is a simple but valuable upgrade that can make a big difference in speed and convenience. I like that it keeps extra shells within easy reach, which helps improve readiness without adding much complexity. Overall, my takeaway is that it’s a practical accessory for anyone who wants better organization and quicker access on their shotgun.
Author Profile
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Mara Whitcombe is the writer behind MakeUpLondonAcademy.com. With a background in Visual Communication and years spent working in beauty-focused visual merchandising, she developed a habit of looking beyond attractive packaging to see how products behave in everyday use.
Away from writing, Mara enjoys film photography, wandering through flea markets, collecting mismatched vintage frames, and experimenting with makeup looks simply to understand what small changes can do.
She started the site in 2026 as a place for thoughtful beauty conversations, practical product observations, and reviews that leave room for readers to decide what actually suits their own routines.
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