--- product_id: 477147304 title: "Monstrum Side Saddle Shell Holder Compatible with Winchester SXP Defender / 1300 Model Shotguns | 12 Gauge" brand: "monstrum" price: "£33.33" currency: GBP in_stock: true reviews_count: 8 category: "Monstrum" url: https://www.desertcart.co.uk/products/477147304-monstrum-side-saddle-shell-holder-compatible-with-winchester-sxp-defender store_origin: GB region: United Kingdom --- # 6-shell capacity Picatinny/Weaver mount compatible No gunsmithing install Monstrum Side Saddle Shell Holder Compatible with Winchester SXP Defender / 1300 Model Shotguns | 12 Gauge **Brand:** monstrum **Price:** £33.33 **Availability:** ✅ In Stock ## Summary > 🔫 Reload faster, aim sharper, dominate smarter. ## Quick Answers - **What is this?** Monstrum Side Saddle Shell Holder Compatible with Winchester SXP Defender / 1300 Model Shotguns | 12 Gauge by monstrum - **How much does it cost?** £33.33 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/477147304-monstrum-side-saddle-shell-holder-compatible-with-winchester-sxp-defender) ## 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 - • **Tool-Free Installation:** Installs easily with included set screws—no gunsmithing needed, no downtime. - • **Ready for Rapid Reloads:** Holds up to six 12 gauge shells for instant access on the field. - • **Built to Last a Lifetime:** Backed by Monstrum’s lifetime guarantee for unmatched durability and peace of mind. - • **Precision Optics Mounting:** Seamlessly attach Picatinny or Weaver scopes and red dots to elevate your aim. - • **Tailored Fit for Winchester SXP Defender/1300:** Custom-designed to perfectly fit your 12 gauge Winchester SXP Defender or 1300 model shotgun. ## Overview The Monstrum Side Saddle Shell Holder is a precision-engineered accessory designed exclusively for 12 gauge Winchester SXP Defender and 1300 shotguns. It securely holds six shells, supports Picatinny and Weaver optics, and installs effortlessly with included hardware—no gunsmithing required. Crafted for durability and backed by a lifetime guarantee, it’s the ultimate upgrade for serious shooters seeking speed, reliability, and tactical advantage. ## Description desertcart.com : Monstrum Side Saddle Shell Holder Compatible with Winchester SXP Defender / 1300 Model Shotguns | 12 Gauge : Sports & Outdoors Review: Very nice! - Fits perfectly and looks great. As far as the fit of some shot shells, yes, they can be a bit loose. They don't fall out but slip. Some other shells fit better so the tolerance is critical. I may take it off again and use my heat gun to get them to be a tad tighter by heating them and squeezing them in a little. I believe they are plastic but will look closer soon. Just got it today. Screws were perfect too but I recommend using a light duty locktite product and be sure not to over torque them. Gun receiver is Aluminum so torque is also critical. UPDATE: I used my heat gun to heat each shell holder and then held each in tighter until they cooled. Use a glove or rag to hold them in while hot. Worked perfectly. They will not fall out from gravity or a hard shake yet pull out with no issues. Just be careful of your heat setting and time on each holder. They only need to close a few thousands of an inch to correct them. I squeeze them a good amount because they relax back into original position, minus just enough to fix the problem. Review: Perfect fit - Ordered this side saddle for my Winchester sxp marine defender 12ga and it fit perfectly . Very well made product, am very pleased with the purchase. ## Features - Built for use with 12 gauge Winchester SXP Defender / 1300 Model Shotguns; Not compatible with other SXP shotgun models - Shell holder accomodates up to six 12 gauge shotgun shells - Mount allows for the mounting of Picatinny or Weaver standard scopes, red dots, or other optics - Installs via included set screws into the factory mounting holes with no additional gunsmithing required - All Monstrum mounts and accessories come with a lifetime guarantee ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BGMW52VL | | Best Sellers Rank | #96,056 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #293 in Hunting & Shooting Gun Stock Accessories | | Brand Name | Monstrum | | Customer Reviews | 4.6 4.6 out of 5 stars (167) | | Date First Available | September 27, 2022 | | Item Package Dimensions L x W x H | 6.69 x 2.48 x 1.93 inches | | Manufacturer | Monstrum | | Package Weight | 0.19 Kilograms | | Part Number | RM241 | ## Images ![Monstrum Side Saddle Shell Holder Compatible with Winchester SXP Defender / 1300 Model Shotguns | 12 Gauge - Image 1](https://m.media-amazon.com/images/I/61JWYHBcTdL.jpg) ![Monstrum Side Saddle Shell Holder Compatible with Winchester SXP Defender / 1300 Model Shotguns | 12 Gauge - Image 2](https://m.media-amazon.com/images/I/71LRtXcnf2L.jpg) ![Monstrum Side Saddle Shell Holder Compatible with Winchester SXP Defender / 1300 Model Shotguns | 12 Gauge - Image 3](https://m.media-amazon.com/images/I/71da0BKzrXL.jpg) ![Monstrum Side Saddle Shell Holder Compatible with Winchester SXP Defender / 1300 Model Shotguns | 12 Gauge - Image 4](https://m.media-amazon.com/images/I/816OwoSCvUL.jpg) ## Questions & Answers **Q: What tool do I need to install the set screws?** A: Small Allen wrench which is come with the package **Q: I want to buy this for friend he is kind lets us borrow his shotgun. this is model Winchester defender upc048702114090** A: I bought this for my Winchester SXP Marine Defender and it fits well. Although my Defender is a slightly different model than yours, the unit mounts to the top of the weapon via the standard factory accessory / optic mounting holes, so it should fit yours as well. **Q: Will this fit an SX4?** A: If it has the four screws on top and doesn't interfere with the action then yes it should work. **Q: Would this fit a stevens 320 defense 12ga.?** A: I can’t say, but it fit my Winchester perfectly. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very nice! *by S***. on December 27, 2023* Fits perfectly and looks great. As far as the fit of some shot shells, yes, they can be a bit loose. They don't fall out but slip. Some other shells fit better so the tolerance is critical. I may take it off again and use my heat gun to get them to be a tad tighter by heating them and squeezing them in a little. I believe they are plastic but will look closer soon. Just got it today. Screws were perfect too but I recommend using a light duty locktite product and be sure not to over torque them. Gun receiver is Aluminum so torque is also critical. UPDATE: I used my heat gun to heat each shell holder and then held each in tighter until they cooled. Use a glove or rag to hold them in while hot. Worked perfectly. They will not fall out from gravity or a hard shake yet pull out with no issues. Just be careful of your heat setting and time on each holder. They only need to close a few thousands of an inch to correct them. I squeeze them a good amount because they relax back into original position, minus just enough to fix the problem. ### ⭐⭐⭐⭐⭐ Perfect fit *by J***H on February 5, 2026* Ordered this side saddle for my Winchester sxp marine defender 12ga and it fit perfectly . Very well made product, am very pleased with the purchase. ### ⭐⭐⭐⭐⭐ Easy install perfect fit *by C***L on June 19, 2025* Why did you pick this product vs others?: Super easy to install good quality almost like it should’ve been on there from factory small price for a big function and aestheticly pleasing ## Frequently Bought Together - Monstrum Side Saddle Shell Holder Compatible with Winchester SXP Defender / 1300 Model Shotguns | 12 Gauge - Monstrum Shotgun Accessory Mount V2 | Flashlight + Sling - CVLIFE Shotgun Sling with Shell Holder, Gun Sling Holds15 Shells for 12 Gauge, Adjustable Two Point Sling with Sling Swivels for Outdoors --- ## 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.co.uk/products/477147304-monstrum-side-saddle-shell-holder-compatible-with-winchester-sxp-defender](https://www.desertcart.co.uk/products/477147304-monstrum-side-saddle-shell-holder-compatible-with-winchester-sxp-defender) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-16*