Speedloaders & AccessoriesAdvanced TechnologySold by Brownells

Advanced Technology

Side Saddle Gen 2 Mrw

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Cnc Machined

6061 T6 aluminum construction

Military Type

III anodized finish

Integrated Top

Rail included

9-shell Customizable

Configuration

Shell Holders

Mount in any location

$65.99
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SKU: 100035870

Overview

This side saddle is designed to add organized, accessible shell storage to compatible 12-gauge shotguns, making it a practical choice for hunters and shooters who want extra rounds close at hand. Its customizable 9-shell configuration lets you place shell holders where you want them, so you can set it up to match your preferred carry and loading style. The integrated top rail and skeletonized design give it a streamlined profile, while the CNC-machined 6061 T6 aluminum and military-grade reinforced synthetic material provide a solid, purpose-built construction. It fits Mossberg 500/590 12GA with a tapped receiver directly, with modifications required for Maverick 88, Remington 870, and Winchester SXP.

Why Hunters Choose the Advanced Technology

Cnc Machined

6061 T6 aluminum construction for

Military Type

III anodized finish specified in

Integrated Top

Rail adds accessory mounting capability

Nine-shell Customizable

Configuration lets you arrange holders

Shell Holders

Can be mounted in any

Key Features

  • CNC machined 6061 T6 aluminum construction
  • Military Type III anodized finish
  • Integrated top rail included
  • 9-shell customizable configuration
  • Shell holders mount in any location
  • Sleek skeletonized side saddle design
  • Direct fit for Mossberg 500/590 12GA with tapped receiver

Best Used For

  • Mossberg 500/590 12GA owners with tapped receivers needing organized side-mounted shell storage
  • Hunters wanting a customizable nine-shell setup for shotgun-ready access in the field
  • Users who prefer a skeletonized side saddle with an integrated top rail
  • Maverick 88, Remington 870, or Winchester SXP owners willing to use modified fitment
  • Shooters seeking a straightforward accessory with adjustable shell holder placement

Pros

  • CNC machined 6061 T6 aluminum construction for a rigid mounting platform
  • Military Type III anodized finish specified in the product details
  • Integrated top rail adds accessory mounting capability
  • Nine-shell customizable configuration lets you arrange holders as needed
  • Shell holders can be mounted in any location on the side saddle
  • Direct fit for Mossberg 500/590 12GA with tapped receiver

Considerations & Trade-offs

  • Requires a Mossberg 500/590 12GA with a tapped receiver for direct fit; other listed shotguns need modifications, so compatibility is not universal.
  • The 9-shell setup is customizable, but shell holders can be mounted in any location, which means setup is user-dependent rather than fixed.
  • Installation calls for care with screw torque; over-tightening can strip holes or break screw heads, and those issues are not covered under the warranty.
  • The integrated top rail adds utility, but it also means the side saddle is not just a shell carrier and may affect how the shotgun is configured overall.

Suggested Comparisons

  • Shotgun shell carriers
  • Shotgun accessory rails
  • Mossberg 500/590-compatible accessories

Suggested Accessories

  • Shotgun shell carrier
  • Optics rail accessory
  • Shotgun cleaning kit
  • Mounting hardware

Frequently Asked Questions

Which shotguns does this side saddle fit directly?

It directly fits Mossberg 500/590 12GA models with a tapped receiver.

What other shotguns can it fit?

It is listed as fitting with modifications on the Maverick 88, Remington 870, and Winchester SXP.

How many shells can it hold?

It has a 9-shell customizable configuration.

Can the shell holders be arranged differently?

Yes. The shell holders can mount in any location on the side saddle, and you can mount as many or as few as desired within the system's configuration.

Does it include a rail?

Yes. The product includes an integrated top rail.