Overview
The Rock Island Armory 3520S AL3.1 revolver is purpose-built for the discerning individual who prioritizes robust personal defense capability. This medium-frame .357 Magnum system integrates an all-steel design with precision-engineered components to ensure reliable function and enhanced safety under various conditions. Its construction is optimized for managing the .357 Magnum cartridge’s energy signature, providing a durable and consistent platform for defensive applications.
Key Features
Construction & Durability
The 3520S AL3.1 features an all-steel construction, encompassing the frame, cylinder, and barrel, all manufactured from stainless steel. This material selection provides superior corrosion resistance and structural integrity, contributing to the firearm’s longevity and consistent performance. The cartridge cylinder is mounted within a robust console, designed to manage and transition recoil forces efficiently to the frame, mitigating stress on critical components. This structural design ensures the firearm’s operational parameters are maintained under sustained use.
Precision & Functionality
Engineered for reliable operation, the cylinder’s rotation mechanism delivers consistent indexing, ensuring precise alignment between the chamber and the forcing cone with each shot. This controlled rotation supports predictable ballistic performance and contributes to the overall accuracy potential of the revolver. The design focuses on mechanical consistency, a critical factor for any defensive firearm where reliable cycling and shot placement are paramount.
Integrated Safety Systems
Safety is a primary consideration in the 3520S AL3.1. It incorporates a transfer bar safety mechanism, preventing the hammer from directly contacting the firing pin unless the trigger is fully depressed. This feature, combined with its inherent drop safety, provides a high level of security when carried. The exposed hammer design allows for both traditional double-action (DA) and single-action (SA) operation, offering user flexibility based on situational requirements.
Ergonomics
The revolver is fitted with a black finger-grooved rubber grip. This ergonomic design enhances purchase and control, particularly critical when managing the recoil impulse of the .357 Magnum cartridge. The textured surface and contoured profile facilitate a secure and repeatable hold, contributing to improved shot placement and rapid follow-up shot acquisition.
Technical Specifications
- **Caliber:** .357 Magnum
- **Capacity:** 6 Rounds
- **Barrel Length:** 2 inches
- **Frame Size:** Medium Frame
- **Barrel Type:** Full Shroud Barrel (Stainless Steel)
- **Cylinder Material:** Stainless Steel
- **Frame Material:** Stainless Steel
- **Grip:** Black Finger-Grooved Rubber Grip
- **Safety:** Transfer Bar Safety, Drop Safety
- **Hammer:** Exposed Hammer (DA/SA)









