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Some braces try to do too much. The SB Tactical FS1913A keeps it simple and does it well. This is a low-profile, left side-folding stabilizing brace built for firearms running an M1913 Picatinny interface at the rear of the receiver, and the whole thing shows up as a complete assembly ready to bolt on. The star of the show is the 6061 aluminum strut, which is the key upgrade over the polymer FS1913. That aluminum means less flex under cheek pressure and less wobble when it's extended, which you'll notice most on heavier or harder-recoiling builds.
The folding action is where these earn their keep. It folds to the left, keeping the strut clear of common right-side controls and shrinking your overall package for storage or transport. The steel hinge locks solidly in both the folded and extended positions, and a pull-through design lets you snap it back into place fast when you need it. If you've ever fought with a brace that flops around or unlocks on its own, the newer steel hinge on the aluminum model has a reputation for staying put through recoil.
Compatibility is the big draw here. Any platform with a rear 1913 Picatinny rail is fair game, and SB Tactical points to popular hosts like the SIG MPX, MCX, Rattler, and the Rock River LAR-PDS. Builders also run these on setups like the Stribog and CZ Scorpion with the right 1913 adapter. Because it mounts to a rail instead of a buffer tube, it opens the door for compact pistol builds that wouldn't work with a traditional receiver extension.
At roughly 9.25 inches long, 13 ounces, and a slim 1.2-inch max width, this brace keeps your firearm handy without adding bulk. The included adjustable nylon strap wraps your forearm for real support, and the one-inch strap width strikes a nice balance between comfort and a secure hold. One tip from folks who run these: torque the mount down well when you install it so it stays rock solid. Veteran designed and made in the USA, the FS1913A is a clean, no-nonsense choice for anyone building around a rear Picatinny interface.
It works with any platform that has an M1913 Picatinny rail at the rear of the receiver. SB Tactical lists common hosts like the SIG MPX, MCX, Rattler, and Rock River LAR-PDS. Builders also run it on the Stribog and CZ Scorpion when paired with the correct 1913 adapter, so it's worth confirming your specific receiver interface before ordering.
The main difference is the strut. The FS1913A uses a 6061 aluminum strut while the standard FS1913 uses polymer. The aluminum version is more rigid with less flex, runs about three ounces heavier at 13 ounces, and is a touch shorter at 9.25 inches. Otherwise the steel hinge, brace cuff, and 1913 mount are the same.
No. It mounts directly to a rear 1913 Picatinny rail rather than a receiver extension, so it's a great fit for compact builds that don't use a traditional buffer tube. It ships as a complete, ready-to-install assembly, so you just secure it to the rail and go.
The aluminum FS1913A uses SB Tactical's updated steel hinge, which locks solidly in both the folded and extended positions. Reviewers running it hard have found the aluminum model holds its lock-up reliably under recoil. As with any rail-mounted accessory, torque the mount down well during installation for the most secure fit.
| UPC | 699618783148 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | FS1913A-01-SB |
| Color | Black |
| Length | 11.9000 |
| Model | |
| Product Type | Stabilizing Brace |
| Shipping Weight | 1.09 |
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