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🔫 Gear up fast, reload faster — never miss a shot!
The Monstrum Side Saddle 12 Gauge Shotgun Shell Holder is a rugged, powder-coated alloy steel accessory designed for quick reloads. Compatible with all Picatinny mounting platforms, it holds six shells securely and installs without any gunsmithing. Backed by a lifetime warranty, it’s the ultimate tactical upgrade for serious shooters.








| Brand | Monstrum |
| Color | Black |
| Finish Type | Powder Coated |
| Finish Types | Powder Coated |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| UPC | 810088812552 |
| Unit Count | 6 Count |
J**K
Love it!
Look the looks, fitment, and quality of this shell holder. This company makes quality products at great prices!
M**L
Awesome
Great, Thanks
M**N
5 star fit and function
This thing is durable. Installed in minutes. Made my shotg%n look badass. Function is great. Holds shells tight but not too tight. For the price you just can’t beat it.
J**E
Panzer M4 hates this
This WILL NOT fit the picatinny rail on a Panzer M4 without modifying. Others have mentioned the same issue. I’ll not going to knock the product because of this. I was able to modify my rail to fit this with some gentle grinding on 2 of the rail slots. Highly suggest blue Loc-tite when securing. Product seems well made, mounts are aluminum with 2 screws per mount. Extra screws are included. The shell holders are plastic but do firmly hold. I’m sure the majority of weapon owners will have no issues installing this.
L**N
Fitment tricky, but works out amazingly once fitted
I was confused when I received the item, because the instructions were not very clear. Your first instinct is that the device is made to be "loosened & slid on, then tightened down." That is absolutely not the way. The removable locking tabs on the opposite edge of the shell storage, each secured by two bolts, must be removed from the device. Then, you lay the device on top of the Picatinny Mounting rail, & apply one bolt to one of the locking tabs to start tightening it down. Even then, you'll still think "it's not going to fit!" Be patient! Tighten it down, but not all the way, then move to the second bolt on that same locking tab. Tighten it, again, not all the way, then move to the other end & repeat the process on the other end of the device with the second locking tab. Once you have the last of the 4 bolts loosely secured, you'll see that the device has "locked down" to the Picatinny Mount as intended and is nearly flush & flat with the top edge. Just go back then & re-tighten all 4 of the bolts all the way, alternating from one end to the other, until all are all the way tight. You'll find the device will be locked down, in the groove, flat & level, & installed the way it should be. Looks great, & now I have quick-reload capability. This is my home-defense Mossberg 500 HF Tactical, & having 6 extra shells quick-at-hand can be the difference between life & death in a home invasion or home-defense scenario.
B**T
yes.
Good fit. Holds shells well. Happy with this accessory. Recommend for Mossberg 500.
B**R
fit
didn’t fit
M**.
Great deal!
Feels real solid and light weight, looks super clean and over all well priced! I ordered this for my Benelli supernova but unfortunately it didn’t fit the rail I bought :/
Trustpilot
2 months ago
1 month ago