Availability: In Stock
The TacStar 12 gauge sidesaddle rail mount for Mossberg 500/590 shotguns is a straightforward way to add shell capacity and tactical accessories to your shotgun without sending it to a gunsmith. This mount straddles both sides of the receiver, giving you a rigid platform that lets you keep six rounds ready while still using your shotgun's standard bead sight. The black polymer construction with aluminum plate is built to handle field use, and the raised Picatinny rail on top accepts any standard optic or accessory you want to run.
Shotgun carriers—whether you're running a home-defense setup, competing in 3-gun, or just looking to expand what your Mossberg can do—appreciate how the sidesaddle keeps ammo accessible without cluttering the foregrip or requiring new shooting positions. The low-profile design means the mount doesn't get in the way, and the shell retention system is engineered to keep rounds secure through movement and recoil.
Installation is quick: no gunsmithing, no permanent modifications. If you run a Mossberg 500 or 590, you get a functional upgrade that pays for itself the first time you don't have to reload from your vest.
| Gauge | 12 gauge |
| Shotgun Compatibility | Mossberg 500, Mossberg 590 |
| Shell Capacity | 6 rounds |
| Construction | Black polymer with aluminum plate |
| Rail Type | Picatinny |
| Mount Style | Sidesaddle (dual-side receiver) |
Yes. The TacStar sidesaddle is designed specifically for Mossberg 500 and 590 shotguns and requires no gunsmithing or permanent modifications to install.
Yes. The raised Picatinny rail is designed to sit high enough that your standard bead sight remains usable without obstruction.
The mount carries six shells in a low-profile sidesaddle configuration that runs along the side of the receiver.
The top Picatinny rail accepts any standard Picatinny-compatible optic, laser, light, or accessory. The rail height is optimized to work alongside your bead sight.
SKU: 115693173 • Weight: 0.56oz
Availability: In Stock
The TacStar 12 gauge sidesaddle rail mount for Mossberg 500/590 shotguns is a straightforward way to add shell capacity and tactical accessories to your shotgun without sending it to a gunsmith. This mount straddles both sides of the receiver, giving you a rigid platform that lets you keep six rounds ready while still using your shotgun's standard bead sight. The black polymer construction with aluminum plate is built to handle field use, and the raised Picatinny rail on top accepts any standard optic or accessory you want to run.
Shotgun carriers—whether you're running a home-defense setup, competing in 3-gun, or just looking to expand what your Mossberg can do—appreciate how the sidesaddle keeps ammo accessible without cluttering the foregrip or requiring new shooting positions. The low-profile design means the mount doesn't get in the way, and the shell retention system is engineered to keep rounds secure through movement and recoil.
Installation is quick: no gunsmithing, no permanent modifications. If you run a Mossberg 500 or 590, you get a functional upgrade that pays for itself the first time you don't have to reload from your vest.
| Gauge | 12 gauge |
| Shotgun Compatibility | Mossberg 500, Mossberg 590 |
| Shell Capacity | 6 rounds |
| Construction | Black polymer with aluminum plate |
| Rail Type | Picatinny |
| Mount Style | Sidesaddle (dual-side receiver) |
Yes. The TacStar sidesaddle is designed specifically for Mossberg 500 and 590 shotguns and requires no gunsmithing or permanent modifications to install.
Yes. The raised Picatinny rail is designed to sit high enough that your standard bead sight remains usable without obstruction.
The mount carries six shells in a low-profile sidesaddle configuration that runs along the side of the receiver.
The top Picatinny rail accepts any standard Picatinny-compatible optic, laser, light, or accessory. The rail height is optimized to work alongside your bead sight.
SKU: 115693173 • Weight: 0.56oz