Upgrade your defensive or duty shotgun setup with the Aim Sports Side Shell Carrier—a rugged, practical 6-round 12 gauge receiver-mounted shotshell holder built specifically for the Remington 870 platform. Designed with a durable polymer shell carrier and reinforced by an aluminum mounting plate, this side saddle keeps extra shells secured, organized, and instantly accessible right where you need them: on the shotgun itself. This model—MR6RK (UPC 815879013699)—is a smart, budget-friendly way to boost reload speed, carry capacity, and overall readiness without adding bulky pouches or extra gear.
If you’re searching for a Remington 870 side saddle, a 12 gauge 6 round shell carrier, or a dependable receiver shell holder for home defense, range use, or training, the Aim Sports MR6RK delivers practical performance with a lightweight, durable build.
Keep 6 Extra 12 Gauge Shells On the Gun—Right Where You Need Them
A side shell carrier is one of the most useful shotgun upgrades you can make because it ensures your ammo stays attached to the weapon. Instead of digging in pockets, fumbling with loose shells, or relying entirely on a belt pouch, you keep a ready reserve of shells right on the receiver.
With 6-round capacity, this carrier is ideal for:
Home defense readiness and staged storage
Range drills focused on reload speed and manipulation
Training classes where quick access to ammo matters
Field utility when you want extra shells without bulky carry gear
Whether you’re topping off between strings or switching loads, having shells on the receiver helps you stay efficient.
Designed for Remington 870 Compatibility
This model is built to fit the Remington 870, one of the most popular pump shotguns ever made. A receiver-specific fit matters because it helps keep the carrier secure, aligned, and stable under recoil and repeated handling. When installed properly, a receiver-mounted shell holder helps maintain:
Consistent shell retention
Predictable placement for reload technique
Reliable function during manipulation and cycling
A clean, purpose-fit setup instead of “universal” compromises
If you’re upgrading an 870 for defensive use or serious training, a dedicated side shell carrier is a high-value enhancement.
Polymer Shell Carrier + Aluminum Mounting Plate: Lightweight Strength
The Aim Sports MR6RK combines two practical materials to create a carrier that balances durability and weight:
Polymer Carrier Benefits
The polymer shell carrier helps keep the unit lightweight while providing solid, resilient shell retention. Polymer is popular for side saddles because it:
Resists corrosion and weather exposure
Helps reduce overall weight on the receiver
Provides consistent shell tension when properly designed
Handles everyday use without the bulk of all-metal carriers
Aluminum Mounting Plate Benefits
The included aluminum mounting plate reinforces the system for stability and longevity, offering:
Strong mounting integrity under recoil
A rigid base that helps prevent flexing or shifting
A durable foundation for repeated reload practice and hard use
This hybrid approach gives you a tough, practical side saddle that doesn’t overburden your shotgun.
Faster Reloads and Better Load Management
Side shell carriers aren’t just about extra ammo—they’re about better ammo management. With shells mounted in a consistent position, you can build repeatable reload habits and maintain control over load selection.
Common ways shooters use a receiver shell carrier:
Keep buckshot staged for defensive readiness
Stage slugs for select-load drills or hunting crossover setups
Separate shell types for faster decision-making under stress
Maintain a consistent “grab point” for training consistency
Whether you run a traditional “load-two” style, emergency port loads, or topping off between shots, a receiver-mounted carrier supports faster, cleaner manipulation.
Ideal for Home Defense, Tactical Builds, and Range Training
The Aim Sports MR6RK side shell carrier is a strong fit for:
Defensive 870 builds and bedside shotguns
Tactical training and manipulation drills
Patrol-style setups (where applicable)
Range shooters who want speed and convenience
Anyone who wants on-gun ammo without adding external pouches
It’s also a great upgrade if you’re building a practical shotgun system on a budget—high utility with a simple install concept.
Product Details for Search and Verification
Brand: Aim Sports
Product Type: Side Shell Carrier / Receiver-Mounted Shell Holder
Gauge: 12 Gauge
Capacity: 6 rounds
Fitment: Remington 870
Construction: Polymer shell carrier with aluminum mounting plate
Model / Part Number: MR6RK
UPC: 815879013699
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…this is the receiver-mounted shell carrier built to match those searches with practical capacity and durable construction.
Add convenience, speed, and readiness to your Remington 870 with the Aim Sports Side Shell Carrier 12 Gauge 6rd (MR6RK)—a lightweight polymer carrier reinforced by an aluminum mounting plate, built to keep spare shells secure, accessible, and always on the gun.
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