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

Upgrade your Mossberg 590 Shockwave with the Trinity Supply Saddle Mount Picatinny Rail and Shell Holder Combo, designed to enhance versatility, stability, and rapid reload capability for hunting, tactical use, and home defense.

This precision-machined saddle mount features a solid one-piece design that securely straddles both sides of the receiver, providing a stable platform for mounting optics and accessories. The full-length Picatinny rail includes 13 slots for flexible placement of scopes, red dots, and other Weaver/Picatinny-compatible accessories.

Installation is quick and simple using existing receiver ports — no gunsmithing, firearm modifications, or special tools required.

The included removable polymer shell holder mounts directly to the rail and holds five 12-gauge shells securely for fast and convenient reload access during critical situations.

Constructed from lightweight aircraft-grade aluminum with a non-glare matte black finish, this combo delivers long-lasting durability while maintaining a sleek tactical profile.

Built for reliability. Designed for performance. Ready for the field.

🔹 Key Features

Compatibility

• ✔ Designed for Mossberg 590 Shockwave 12-Gauge

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

Saddle Mount Rail

• ✔ Solid one-piece saddle design for superior stability

• ✔ Full-length Picatinny rail with 13 slots

• ✔ Perfectly contoured to receiver profile

• ✔ Installs using existing receiver ports

• ✔ No gunsmithing required

• ✔ Lightweight aircraft-grade aluminum construction

• ✔ Non-glare matte black anodized finish

Shell Holder

• ✔ Removable Picatinny-mounted shell carrier

• ✔ Holds 5 shells (2¾" or 3")

• ✔ Secure retention under recoil

• ✔ Durable glass-filled polymer construction

• ✔ Quick access for faster reloads

🔹 Specifications

Saddle Mount:

• Rail Length: 5.75"

• Weight: 5 oz

• Material: Aircraft-grade aluminum

Shell Holder:

• Capacity: 5 shells

• Length: 4.5"

• Width: 1.5"

• Weight: 1.3 oz