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  • Mossberg 500/590 Side Saddle Shell Holder with Picatinny Rail Mount – 6 Round 12 Gauge Carrier
  • Mossberg 500/590 Side Saddle Shell Holder with Picatinny Rail Mount – 6 Round 12 Gauge Carrier
  • Mossberg 500/590 Side Saddle Shell Holder with Picatinny Rail Mount – 6 Round 12 Gauge Carrier
  • Mossberg 500/590 Side Saddle Shell Holder with Picatinny Rail Mount – 6 Round 12 Gauge Carrier
  • Mossberg 500/590 Side Saddle Shell Holder with Picatinny Rail Mount – 6 Round 12 Gauge Carrier
  • Mossberg 500/590 Side Saddle Shell Holder with Picatinny Rail Mount – 6 Round 12 Gauge Carrier
  • Mossberg 500/590 Side Saddle Shell Holder with Picatinny Rail Mount – 6 Round 12 Gauge Carrier
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Mossberg 500/590 Side Saddle Shell Holder with Picatinny Rail Mount – 6 Round 12 Gauge Carrier

Mossberg 500/590 Side Saddle Shell Holder with Picatinny Rail Mount – 6 Round 12 Gauge Carrier

$39.95
$49.00 $39.95
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SKU: 2235
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  • Description
  • Reviews

Description

Enhance your Mossberg shotgun with the Monstrum Side Mounted Shell Holder with Integrated Picatinny Rail Mount, designed for quick-access reloading and tactical versatility. Compatible with Mossberg 500, 535, 835, 590, 590A1, and Shockwave shotguns, this rugged side saddle securely holds up to six 12 gauge shells while providing a stable Picatinny rail platform for optics or accessories.

Built from lightweight, high-strength polymer and precision-machined components, this shell carrier is engineered for dependable retention under recoil and rapid shell access when every second matters. The ambidextrous design allows installation on either side of the receiver, making it ideal for both left- and right-handed shooters.

The two-piece integrated system mounts directly to factory receiver holes with no gunsmithing required on compatible Mossberg models. Perfect for tactical setups, home defense, hunting, and range applications.

Key Features

  • Holds up to 6 rounds of 12 gauge ammunition
  • Compatible with 2¾” and 3” shotgun shells
  • Integrated Picatinny rail mount for optics and accessories
  • Fits Mossberg 500, 535, 835, 590, 590A1, and Shockwave
  • Ambidextrous side-mount design
  • Lightweight and durable construction
  • Secure shell retention under recoil and movement
  • Fast-access reload capability
  • Direct-fit installation using factory mounting holes
  • No gunsmithing required on compatible models

Specifications

  • Brand: Monstrum
  • Compatibility: Mossberg 500 / 535 / 835 / 590 / 590A1 / Shockwave
  • Shell Capacity: 6 Rounds
  • Shell Compatibility: 12 Gauge, 2¾” and 3” shells
  • Weight: 4 oz
  • Length: 6 in
  • Width: 2 in
  • Height: 1.75 in

Compatibility Note

Compatible with most Mossberg 500 and 590 series shotguns using factory receiver mounting holes.
Pre-1997 Mossberg models may require 6x48 TPI screws (not included) due to different mounting hole patterns.

Reviews

Customer Reviews

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Customer
I like it. It is made of sturdy aluminum, and not plastic which will last a lifetime. I like how it

I like it. It is made of sturdy aluminum, and not plastic which will last a lifetime. I like how it doesn't need to be installed by the the trigger action pins on the side of the receiver which I have heard can lead to binding/slowing of the pump action bars. This Monstrum one installs on the factory drilled and tapped screw holes on the top of the receiver. Overtime, if the 12g shells become loose in the holder its an easy fix with some one-sided self adhesive felt tape or something similar on the inside if the holder rings. I think its currently the best option on the market for the price. I bought an inexpensive $27 Turkey(Turkish) made metal ghost ring sight(LPA style) to go on the picatinny rail from TRimports. I have this same setup on 2 of my Mossbergs.

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