--- product_id: 161561204 title: "Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns" brand: "monstrum" price: "₹ 7326" currency: INR in_stock: true reviews_count: 8 category: "Monstrum" url: https://www.desertcart.in/products/161561204-side-saddle-shell-holder-with-picatinny-rail-mount-for-mossberg store_origin: IN region: India --- # Picatinny rail for optics Fits Mossberg 500/590/Shockwave No gunsmithing needed install Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns **Brand:** monstrum **Price:** ₹ 7326 **Availability:** ✅ In Stock ## Summary > 🔫 Lock, Load, and Level Up Your Shotgun Game! ## Quick Answers - **What is this?** Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns by monstrum - **How much does it cost?** ₹ 7326 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/161561204-side-saddle-shell-holder-with-picatinny-rail-mount-for-mossberg) ## Best For - monstrum enthusiasts ## Why This Product - Trusted monstrum brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Robust Aluminum Build:** Durable, lightweight aluminum construction built to withstand rugged use and harsh conditions. - • **Caliber-Specific Shell Capacity:** Choose 12 gauge (holds 6 shells) or 20 gauge (holds 7 shells) to match your shotgun and never run dry. - • **Integrated Picatinny Rail Mount:** Mount scopes, red dots, or optics effortlessly to elevate your tactical edge. - • **Precision Fit for Mossberg Series:** Seamlessly designed for Mossberg 500, 590, and Shockwave shotguns—no guesswork, just perfect compatibility. - • **Quick, Tool-Included Installation:** Install in under 5 minutes with included screws and Allen wrench—no gunsmith required. ## Overview The Monstrum Side Saddle Shell Holder is a precision-engineered aluminum accessory designed exclusively for Mossberg 500, 590, and Shockwave series shotguns. Featuring a built-in Picatinny rail, it allows seamless mounting of optics while securely holding 6 or 7 shells depending on caliber. Installation is quick and tool-assisted with no gunsmithing required, making it the ultimate upgrade for professionals and enthusiasts seeking tactical readiness and reliability. ## Description desertcart.com : Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns | 12 Gauge : Sports & Outdoors Review: "WHEN ORDERING MAKE SURE YOU CLICK ON THE 12 GA OR 20 GA MODEL BEFORE COMPLETING THE PURCHASE". - It installed very easy and fits perfectly. It doesn't cover the safety or go past the chamber over the barrel on a Mossberg 590 12 ga shot gun. The 6 shells are held in tightly yet I didn't have any problem removing the 6 shells and reloading. The bad reviews are not accurate. I read all the negative reviews and was concerned after I purchased the item, but I figured I would give it a shot (Pun intended). I thought if it doesn't fit I will return it but it can't hurt to try it since there are so many good reviews. It goes on so easily I was pleasantly satisfied. It took me 5 minutes to install and I didn't need longer screws or any "LOCK TIGHT" to install it and snug it down securely. All the screws and the allen wrench came in the box that I used to install it. I will say though "WHEN ORDERING MAKE SURE YOU CLICK ON THE 12 GA OR 20 GA MODEL BEFORE COMPLETING THE PURCHASE". I think that is what throws people off to get a negative review because they receive the wrong caliber shell holder (12 ga 6 shell holder or a 20 ga 7 shell holder, that also threw me off in the description compared to the picture provided they have to describe the item on the desertcart page). And they do not realize it until they receive it and some people after receiving it. I ordered the product then had to cancel because it was set on the 20 ga, It was easy to cancel that order and reorder the 12 ga model. I don't have a picture but it fit perfectly on my Mossberg 590 12ga as pictured on other good reviews.. Sturdy metal and polymer material, built to last and take some good hard working abuse !!! I AM VERY HAPPY WITH THIS ITEM , IT IS JUST WHAT I WANTED !! I will order again if I get another Mossberg 500, 590 or 590A1 12 ga. Review: Fantastic product! Very well made, looks great - I have done business with them before, and I will do business with them again absolutely excellent products in their customer service this second to none I would highly recommend purchasing their products ## Features - 100% Weave - Imported - Built for use with Mossberg 500, 590, and Shockwave Series shotgun models - Not compatible with Mossberg 500 Bantam, Mossberg 500 Combo, Mossberg 500 Flex Models or models where the pump action extends past the receiver when pumped. See attached infographic before purchasing. Pre-1997 Mossberg shotguns were manufactured with a different mounting hole pattern and will require 6x48TPI screws (not included). - Shell holder available in two sizes - 12 gauge saddle accomodating up to six 12 gauge shells and 20 gauge saddle accomodating up to seven 20 gauge shells - Rail mount allows for the mounting of Picatinny or Weaver standard scopes, red dots, or other optics - Installs via included set screws into the Mossberg factory mounting holes with no additional gunsmithing required ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07WHN74TW | | Best Sellers Rank | #32,159 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #29 in Hunting & Shooting Gun Holders | | Brand | Monstrum | | Brand Name | Monstrum | | Color | Black | | Customer Reviews | 4.6 out of 5 stars 3,751 Reviews | | Included Components | SideSaddle | | Manufacturer | Monstrum | | Manufacturer Part Number | Z83 | | Material | Aluminum | | Material Type | Aluminum | | Number of Compartments | 1 | | Number of Items | 1 | | UPC | 850004377246 | | Warranty Description | Lifetime Warranty | ## Product Details - **Brand:** Monstrum - **Color:** Black - **Manufacturer:** Monstrum - **Material:** Aluminum - **Number of Items:** 1 ## Images ![Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns - Image 1](https://m.media-amazon.com/images/I/619vpJD7W5L.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Will this mount to the mossberg maverick 88 12g?** A: You can drill and tap it yourself. It will fit if you are willing and able to do this correctly. It is a bit of a pain, but it is a great way to save $250 over moving up to a 500 or 590 just for the holes. You can buy a drill press, still have money left over, and get an optic mounted on your shotty. The 88 is fantastic for the money, except for the lack for 4 holes atop the receiver. :( **Q: I have a crimson trace on my Mossberg 590, will this be too much to fit on there?** A: I ordered this for use with my Shockwave with crimson trace. The crimson trace changes the profile of the receiver and the mount did not sit flush when installed. I opted for the GG&G side saddle designed for the shock wave. More expensive but better quality. When installed the top rail and side saddle was canted to the right and also it sat way too high above bore. **Q: Is this good for 590 shockwave 20 gauge?** A: I have a 590 shockwave 12 gauge and fit and works great **Q: Will this fit a mossberg 940?** A: It has predrilled holes that makes it compatible with almost all shotguns, so yes. ## Customer Reviews ### ⭐⭐⭐⭐⭐ "WHEN ORDERING MAKE SURE YOU CLICK ON THE 12 GA OR 20 GA MODEL BEFORE COMPLETING THE PURCHASE". *by A***R on May 24, 2021* It installed very easy and fits perfectly. It doesn't cover the safety or go past the chamber over the barrel on a Mossberg 590 12 ga shot gun. The 6 shells are held in tightly yet I didn't have any problem removing the 6 shells and reloading. The bad reviews are not accurate. I read all the negative reviews and was concerned after I purchased the item, but I figured I would give it a shot (Pun intended). I thought if it doesn't fit I will return it but it can't hurt to try it since there are so many good reviews. It goes on so easily I was pleasantly satisfied. It took me 5 minutes to install and I didn't need longer screws or any "LOCK TIGHT" to install it and snug it down securely. All the screws and the allen wrench came in the box that I used to install it. I will say though "WHEN ORDERING MAKE SURE YOU CLICK ON THE 12 GA OR 20 GA MODEL BEFORE COMPLETING THE PURCHASE". I think that is what throws people off to get a negative review because they receive the wrong caliber shell holder (12 ga 6 shell holder or a 20 ga 7 shell holder, that also threw me off in the description compared to the picture provided they have to describe the item on the Amazon page). And they do not realize it until they receive it and some people after receiving it. I ordered the product then had to cancel because it was set on the 20 ga, It was easy to cancel that order and reorder the 12 ga model. I don't have a picture but it fit perfectly on my Mossberg 590 12ga as pictured on other good reviews.. Sturdy metal and polymer material, built to last and take some good hard working abuse !!! I AM VERY HAPPY WITH THIS ITEM , IT IS JUST WHAT I WANTED !! I will order again if I get another Mossberg 500, 590 or 590A1 12 ga. ### ⭐⭐⭐⭐⭐ Fantastic product! Very well made, looks great *by B***R on May 26, 2026* I have done business with them before, and I will do business with them again absolutely excellent products in their customer service this second to none I would highly recommend purchasing their products ### ⭐⭐⭐⭐⭐ Nice add-on *by P***K on July 1, 2026* Great little add on to the shockwave lazer style. You have to mount on the left side because of the laser. But doesn’t throw the balance off, when Pummeling targets. Great little piece. ## Frequently Bought Together - Monstrum Side Saddle Shell Holder for Mossberg 500/590/Shockwave Series Shotguns - ZOEKIM Tactical Grip Glove for Mossberg 590 500 Shockwave Accessories & Remington Tac-14 Rubber Grip Sleeve - XXTACMM Enhanced Slide Safety for Mossberg 500 590 835 930 Shockwave Accessories Aluminum 5 Color Option --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.in/products/161561204-side-saddle-shell-holder-with-picatinny-rail-mount-for-mossberg](https://www.desertcart.in/products/161561204-side-saddle-shell-holder-with-picatinny-rail-mount-for-mossberg) --- *Product available on Desertcart India* *Store origin: IN* *Last updated: 2026-10-06*