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The Fortis SLS Fifty (Super Lean Sport) is one of those upgrades that fixes an old headache and looks sharp doing it. Most ambidextrous selectors rely on standard socket or Torx screws to hold the levers on, and anyone who has chased a loose lever mid-range trip knows how annoying that gets. Fortis went a different direction here, engineering the whole thing around their patent-pending RidgeKey locking mechanism that clamps the levers to the core with a solid point of contact and no visible screws to work loose.
The selector core is machined from 4140 steel and coated in black nitride, which gives you a smoother bearing surface and better wear resistance over the long haul. The two levers are cut from 6061-T6 aluminum with a skeletonized profile that lets you see the steel core underneath, and they carry a gold anodized finish for a build that gets noticed. Strategically placed serrations give your thumb plenty of real estate whether you are running bare hands or gloves. The whole assembly tips the scale at about half an ounce, so you get the upgrade without any meaningful weight penalty.
One of the best parts of this selector is the built-in choice between a 50-degree and 90-degree throw. Run the shorter 50-degree throw for faster transitions between safe and fire, or stick with the traditional 90-degree feel if that is what your muscle memory prefers. It drops into any mil-spec AR-15 lower, and the medium-length lever profile keeps it comfortable for a wide range of shooting styles.
Folks who have swapped one in tend to notice a crisper, more positive engagement than the stock mil-spec unit, and the larger profile is easier to find without looking down. If you are building out a rifle and want a safety that performs as well as it looks, the SLS Fifty in gold earns its spot.
Instead of the usual socket or Torx screws that hold the levers on, the SLS Fifty uses Fortis' patent-pending RidgeKey locking mechanism to clamp the levers to the core with no visible screws. That solid point of contact removes the common weak spot where screws tend to loosen, back out, or snap over time. It is a cleaner, more secure setup that holds up to hard use.
Yes, the steel core is built with both options so you can set it up for either a short 50-degree throw or the traditional 90-degree throw. The shorter throw makes for faster transitions between safe and fire, which is handy for competition or fast-paced drills. You pick whichever matches your muscle memory and shooting style during installation.
It drops into any mil-spec AR-15 lower receiver, so if your rifle takes standard AR components you are good to go. Keep in mind the SLS Fifty is the selector core and lever assembly, so you will use your existing detent and spring, or grab those separately if you are starting from scratch. The RidgeKey system takes a moment to get familiar with, but installation is straightforward once you see how the cam track and threaded detent work together.
The levers are machined from 6061-T6 aluminum with a gold anodized finish, and the core is 4140 steel coated in black nitride for smoother operation and better wear resistance. Anodizing is a hard, wear-resistant finish that holds its color well through regular range use. The skeletonized lever design lets the steel core show through for a distinctive look.
| UPC | 855476008339 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | SLS-50-GOLD |
| Model | |
| Product Type | Safety Selector |
| Color | Gold |
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