--- product_id: 314768107 title: "Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns" brand: "monstrum" price: "S/.306" currency: PEN in_stock: true reviews_count: 8 category: "Monstrum" url: https://www.desertcart.pe/products/314768107-monstrum-side-saddle-shell-holder-with-picatinny-rail-mount-mossberg store_origin: PE region: Peru --- # Holds up to 7 shells (20 gauge) Fits Mossberg 500/590/Shockwave No gunsmithing needed installation Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns **Brand:** monstrum **Price:** S/.306 **Availability:** ✅ In Stock ## Summary > 🔫 Lock, Load, and Lead with Monstrum – Your Shotgun’s Ultimate Sidekick! ## Quick Answers - **What is this?** Monstrum Side Saddle Shell Holder with Picatinny Rail Mount for Mossberg 500/590/Shockwave Series Shotguns by monstrum - **How much does it cost?** S/.306 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/314768107-monstrum-side-saddle-shell-holder-with-picatinny-rail-mount-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 - • **Durable Polymer Build:** Lightweight yet rugged polymer construction designed to withstand the elements and heavy use. - • **Sleek Tactical Profile:** Low-profile black finish complements your shotgun’s aesthetics while enhancing quick reloads. - • **Optimized Shell Capacity:** Choose between 6-shell 12 gauge or 7-shell 20 gauge holders to stay battle-ready. - • **Lifetime Guarantee Confidence:** Backed by Monstrum’s lifetime warranty—gear up with zero worries. - • **Precision Fit for Mossberg Series:** Seamlessly mounts to factory holes—no extra tools or gunsmithing required. ## Overview The Monstrum Side Saddle Shell Holder is a precision-engineered polymer accessory designed exclusively for Mossberg 500, 590, and Shockwave shotguns. Available in two sizes to hold up to six 12 gauge or seven 20 gauge shells, it installs effortlessly using factory mounting points—no gunsmithing required. Its durable build and lifetime guarantee make it a reliable upgrade for professionals and enthusiasts seeking quick access and tactical readiness. ## Description desertcart.com : Monstrum Side Saddle Shell Holder for Mossberg 500/590/Shockwave Series Shotguns | 20 Gauge : Sports & Outdoors Review: Icing on the Cake - Monstrum is the finishing touch! Bird head grip, factory head shield, and now the Monstrum rail and side saddle. NICE! Good price with the $5 discount code and easy installation. This will last for years. I’m a very satisfied customer! Review: Make sure of the size that you need before you order - The item looks awesome just make sure the you order the size that you need mine fits perfectly and looks nice ## Features - Built for use with Mossberg 500, 590, and Shockwave Series shotgun models; Not intended for use with other shotguns models - 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 - Unit installs into the factory mounting holes of Mossberg 500 / 590 / and 590 Shockwave Series shotgun models with no additional gunsmithing required - All Monstrum accessory products come with a lifetime guarantee ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09396YPV9 | | Best Sellers Rank | #40,996 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #1,198 in Ammunition & Magazine Pouches | | Brand | Monstrum | | Brand Name | Monstrum | | Closure Type | open top | | Color | Black | | Customer Reviews | 4.4 out of 5 stars 181 Reviews | | Item Weight | 7.05 ounces | | Manufacturer | Monstrum | | Manufacturer Part Number | Z83-20G | | Material | polymer | | Material Type | polymer | | Number Of Pockets | 2 | | Number of Compartments | 2 | | Number of Items | 1 | | Pocket Description | Side-mounted shell holder pocket | ## Product Details - **Color:** Black - **Brand:** Monstrum - **Material:** polymer - **Item Weight:** 7.05 Ounces - **Number Of Pockets:** 2 ## Images ![Monstrum 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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Icing on the Cake *by M***N on April 3, 2026* Monstrum is the finishing touch! Bird head grip, factory head shield, and now the Monstrum rail and side saddle. NICE! Good price with the $5 discount code and easy installation. This will last for years. I’m a very satisfied customer! ### ⭐⭐⭐⭐⭐ Make sure of the size that you need before you order *by J***E on November 5, 2025* The item looks awesome just make sure the you order the size that you need mine fits perfectly and looks nice ### ⭐⭐⭐⭐⭐ Great Fit on Mossberg Shockwave 20G *by D***N on April 20, 2023* Make sure your "firearm" is drilled and tapped for fit and you select the correct gauge. It however mounted perfect. Took a dremel and cut off the first and last shell holder (taking it from 7 shells to 5) so neither hand would get scrapped which was a issue. Holds shells well (tight but not to tight) Would buy again ## Frequently Bought Together - Monstrum Side Saddle Shell Holder for Mossberg 500/590/Shockwave Series Shotguns - Pachmayr 05103 Tactical Grip Glove for Moss Shockwave & Rem Tac 14, Black - XXTACMM Enhanced Slide Safety for Mossberg 500 590 835 930 Shockwave 12/20 Gauge 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.pe/products/314768107-monstrum-side-saddle-shell-holder-with-picatinny-rail-mount-mossberg](https://www.desertcart.pe/products/314768107-monstrum-side-saddle-shell-holder-with-picatinny-rail-mount-mossberg) --- *Product available on Desertcart Peru* *Store origin: PE* *Last updated: 2026-09-13*