Aluminum Saddle Mount Picatinny Rail with Side Rail & Shell Holder for Mossberg 590 Shockwave 12 Gauge

Upgrade your Mossberg 590 Shockwave 12-Gauge with the Trinity Supply Aluminum Saddle Mount with Shell Holder, engineered for strength, stability, and enhanced functionality in hunting, tactical, and home defense applications.

This precision-machined one-piece saddle mount securely straddles both sides of the receiver, providing a solid optic-ready platform. The full-length 5.75" Picatinny top rail features 13 slots for flexible placement of scopes, red dots, and other Weaver/Picatinny-compatible accessories.

For expanded versatility, this system includes a removable 3.5" side Picatinny rail for mounting flashlights, lasers, or additional accessories. Installation is simple using existing receiver ports — no gunsmithing, firearm modifications, or special tools required.

The included aluminum Picatinny-mounted shell holder securely retains five 12-gauge shells (2¾" or 3") for fast reload access under recoil.

Constructed from lightweight aircraft-grade aluminum with a non-glare matte black anodized finish, this system delivers rugged durability without unnecessary bulk.

Built for control. Designed for reliability. Ready for performance.

🔹 Key Features

Compatibility

• ✔ Designed for Mossberg 590 Shockwave 12-Gauge

• ✔ Also compatible with Mossberg 500 & Maverick 88 12-Gauge models

Saddle Mount Rail

• ✔ Solid one-piece saddle design for superior stability

• ✔ 5.75" top Picatinny rail with 13 slots

• ✔ Includes removable 3.5" side Picatinny rail

• ✔ Perfectly contoured to receiver profile

• ✔ Installs using existing receiver ports

• ✔ No gunsmithing required

• ✔ Aircraft-grade aluminum construction

• ✔ Non-glare satin black anodized finish

Aluminum Shell Holder

• ✔ Picatinny-mounted aluminum shell carrier

• ✔ Holds 5 shells (2¾" or 3")

• ✔ Secure retention under recoil

• ✔ High-strength black anodized finish

• ✔ Quick-access reload capability

🔹 Specifications

Saddle Mount:

• Overall Length: 6.8"

• Top Rail Length: 5.75"

• Width: 1.75"

• Height: 2.25"

• Weight: 5 oz

• Material: Aircraft-grade aluminum

Shell Holder:

• Capacity: 5 shells

• Length: 4.75"

• Height: 1.5"

• Width: 1"

• Weight: 5 oz