Trinity Tactical Side Saddle Shell Holder & Picatinny Rail Mount Compatible with Mossberg 500 / 590 / 590A1 12 Gauge

Upgrade your shotgun with the Trinity Tactical Side Saddle Shell Holder & Picatinny Rail Mount, engineered for reliable performance and fast access to extra ammunition. Designed for compatibility with Mossberg 500, 590, 590A1, Shockwave, 535, and 835 12-gauge platforms, this dual-purpose mounting system keeps your shells secured while providing a top Picatinny rail for optics.

This rugged two-piece system mounts directly to the factory receiver mounting holes with no gunsmithing required. The integrated shell holder accommodates up to six 12-gauge shells, ensuring rapid reload capability in tactical, hunting, security, or home defense applications.

Constructed from lightweight yet durable materials, this side saddle and rail combo offers long-lasting performance under recoil while maintaining a streamlined profile. The ambidextrous configuration allows installation for both left- and right-handed shooters.

Whether you're running a red dot, scope, or backup sights, this mount keeps your optic secure and your spare rounds exactly where you need them.

⚠️ Important Fitment Note:
Compatible with most Mossberg 500 / 590 series factory drilled receivers. Pre-1997 models require 6x48 TPI screws (not included).

✅ Key Features

• ✔ Compatible with Mossberg 500, 590, 590A1, Shockwave, 535 & 835 (12 Gauge)

• ✔ Integrated 6-Round 12GA Side Saddle Shell Holder

• ✔ Top Picatinny Rail for Scopes, Red Dots & Optics

• ✔ Direct Receiver Installation – No Gunsmithing Required

• ✔ Ambidextrous Mounting Configuration

• ✔ Secure Retention Under Heavy Recoil

• ✔ Lightweight & Durable Construction

• ✔ Two-Piece System – Designed to Install as a Complete Unit

• ✅ Specifications

  • Gauge: 12 Gauge

  • Shell Capacity: 6 Rounds

  • Length: 6 inches

  • Width: 2 inches

  • Height: 1.75 inches

  • Weight: 4 oz