Fortis SLS Fifty Ambidextrous Safety Selector FDE AR-15
Fortis Manufacturing, Inc.
$37.95
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Fortis Manufacturing, Inc.
Fortis SLS Fifty Ambidextrous Safety Selector FDE AR-15
The Fortis SLS Fifty Ambidextrous Safety Selector in FDE is a precision-engineered AR-15 upgrade that combines innovative locking technology with a slim, lightweight profile for shooters who demand reliability and style from every component.
- Patent-pending RidgeKey locking mechanism eliminates weak points found in screw-based systems
- 6061 T6 aluminum ambidextrous levers keep overall weight low without sacrificing durability
- 4140 steel selector core finished in black nitride for superior wear resistance
- Cutout lever design exposes the core for a clean, modern aesthetic appeal
- Medium-length levers provide optimal ergonomic reach for fast, positive selector actuation
- Flat Dark Earth (FDE) finish pairs seamlessly with popular tactical and desert-themed builds
Who This Is For
The Fortis SLS Fifty is ideal for competitive shooters, tactical enthusiasts, and AR-15 builders who want an ambidextrous safety selector that goes beyond the standard drop-in part. Whether you're running a precision 3-Gun build, a duty rifle, or a custom range setup, the SLS Fifty's RidgeKey system and nitride-coated core deliver the consistent, rattle-free performance that serious AR-15 owners expect.
Specifications
| Brand | Fortis Manufacturing, Inc. |
|---|---|
| Model | SLS Fifty (Super Lean Sport) |
| Color / Finish | Flat Dark Earth (FDE) |
| Lever Material | 6061 T6 Aluminum |
| Core Material | 4140 Steel |
| Core Coating | Black Nitride |
| Selector Type | Ambidextrous |
| Lever Length | Medium |
| Locking System | Patent-Pending RidgeKey |
| Platform Compatibility | AR-15 (Mil-Spec Lower) |
| Positions | Semi-Auto (Safe / Fire) |
Frequently Asked Questions
What makes the RidgeKey locking mechanism better than traditional screw-based selectors?
Most aftermarket ambidextrous safety selectors rely on set screws or Torx fasteners to secure the levers to the selector core, which can loosen over time under recoil or heavy use. Fortis's patent-pending RidgeKey system uses a solid, interference-fit locking interface that creates a more positive and secure point of contact — eliminating the wobble and potential failure points associated with screw-based designs. The result is a more rigid, rattle-free selector that maintains its feel and function over thousands of cycles.
Will the Fortis SLS Fifty fit my AR-15 lower receiver?
Yes — the Fortis SLS Fifty is designed to fit standard mil-spec AR-15 lower receivers. It uses the same 0.250" selector shaft diameter as a standard GI-spec safety selector, so it will drop into most commercial and mil-spec AR-15 lowers without modification. If you are running a non-standard or proprietary lower, verify your receiver's selector well dimensions before purchasing.
Is the black nitride coating on the selector core purely cosmetic, or does it serve a functional purpose?
The black nitride (ferritic nitrocarburizing) finish on the 4140 steel selector core is very much a functional upgrade. Nitride treatment penetrates the surface of the steel rather than sitting on top like a conventional coating, creating a case-hardened layer that dramatically improves wear resistance, corrosion resistance, and surface lubricity. In practical terms, this means your selector will cycle more smoothly in the lower receiver and hold up better to extended use, harsh environments, and infrequent cleaning schedules.
