Upgrade your shotgun with the TRINITY 20 Gauge Side Saddle Shell Carrier with Integrated Picatinny Rail, designed to provide fast access to spare ammunition while adding a convenient optics mounting platform. Built for compatibility with Mossberg 500, 590, Shockwave, 535, 835, and 590A1 platforms, this side-mounted shell holder helps shooters keep extra shells within easy reach.

The carrier securely holds up to seven 20-gauge shotgun shells, keeping them firmly in place while allowing quick access during reloads. The integrated Picatinny rail allows the attachment of optics, red dot sights, or other rail-mounted accessories, improving versatility for range and field use.

Constructed with a durable two-piece design, the shell carrier and rail mount install together as a single unit using the factory receiver mounting holes. The ambidextrous configuration allows installation on either side of the receiver, accommodating both left-handed and right-handed shooters.

Built to withstand recoil while maintaining a lightweight profile, this TRINITY upgrade improves both ammunition accessibility and mounting capability in a compact and efficient design.

Note: Receiver must be drilled and tapped for installation. Pre-1997 Mossberg models may require different mounting screws.

Key Features

HOLDS 7 SHOTGUN SHELLS
Side saddle carrier securely holds up to seven 20-gauge shells for quick reload access.

INTEGRATED PICATINNY RAIL
Allows mounting of optics, red dot sights, or other Picatinny rail accessories.

COMPATIBLE WITH MOSSBERG PLATFORMS
Designed for Mossberg 500, 590, Shockwave, 535, 835, and 590A1 models.

AMBIDEXTROUS INSTALLATION
Mount can be installed on either side of the receiver for left- or right-handed shooters.

DURABLE TWO-PIECE DESIGN
Shell holder and rail mount install together as a single secure unit.

EASY INSTALLATION USING FACTORY HOLES
Installs using receiver mounting holes with no additional gunsmithing required.

COMPACT LIGHTWEIGHT CONSTRUCTION
Maintains firearm balance while providing convenient ammunition storage.

Specifications

Capacity: 7 Shells
Gauge Compatibility: 20 Gauge
Material: Durable Polymer / Aluminum Rail
Mount Type: Receiver Side Mount
Rail Type: Picatinny
Weight: 4 oz
Length: 6 in
Width: 2 in
Height: 1.75 in

Compatibility:
Mossberg 500
Mossberg 590
Mossberg Shockwave
Mossberg 535
Mossberg 835
Mossberg 590A1