SB Tactical SBA3 Pistol Brace Lower Build Kit FDE
$149.95
SB Tactical SBA3 Pistol Brace (SBA3X-01-SB) in FDE bundled with a mil-spec 6-position buffer tube assembly and complete mil-spec lower parts kit (SKU: DT-SBA3-LPK-BT-FDE). The SBA3 adjusts to 5 positions, weighs 6.75 oz, and includes an integral ambidextrous QD sling socket. Everything needed to finish an AR pistol lower or 80% lower in one order.
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The SB Tactical SBA3 Pistol Brace in FDE bundled with a complete mil-spec buffer tube assembly and mil-spec lower parts kit gives you everything needed to finish the rear end of your AR pistol build or complete your 80% lower receiver. The SBA3 is one of the most widely adopted pistol braces available — 5-position adjustable, 6.75 oz, with an integral ambidextrous QD sling socket. This bundle ships with the brace, a full 6-position mil-spec buffer tube assembly, and a complete mil-spec lower parts kit ready to drop into any standard AR-15 pistol lower.
SB Tactical SBA3 Pistol Brace (SBA3X-01-SB) FDE
The SBA3 has been the go-to AR pistol brace since 2019, adopted by over 100 firearm manufacturers. It mounts directly to any mil-spec carbine receiver extension, collapses to 6.1″ and extends to 9.5″, and stays at a slim 1.8″ width. The FDE finish matches standard FDE lower and upper builds. Made in the USA.
- Model: SBA3X-01-SB
- Color: FDE (Flat Dark Earth)
- Weight: 6.75 oz
- Positions: 5
- Length collapsed: 6.1″
- Length extended: 9.5″
- Width: 1.8″
- Material: Synthetic polymer
- Sling socket: Integral ambidextrous QD
- Compatible with: Mil-spec carbine receiver extensions
- Made in the USA
Mil-Spec Buffer Tube Assembly
The included buffer tube assembly is a mil-spec 6-position carbine receiver extension machined from aluminum and hard-coat anodized. It comes with the buffer, buffer spring, castle nut, and end plate — everything needed to fully assemble the rear of your pistol lower.
- Type: Mil-spec receiver extension (buffer tube)
- Material: Aluminum, hard-coat anodized
- Positions: 6
- Includes: Buffer tube, carbine buffer, buffer spring, castle nut, end plate
- Compatible with: All mil-spec AR-15 pistol and rifle lowers
Complete Mil-Spec Lower Parts Kit
The mil-spec LPK covers every fire control and lower assembly component. All parts are mil-spec dimension and drop directly into any standard AR-15 lower receiver without modification.
- Trigger, hammer, disconnector
- Trigger and hammer pins
- Safety selector
- Pistol grip and screw
- Magazine catch, button, and spring
- Bolt catch, plunger, spring, and roll pin
- Buffer retainer and spring
- Takedown and pivot pins with detents and springs
- Forward assist assembly
- Dust cover assembly
- Standard: Mil-spec dimensions
What’s Included
- SB Tactical SBA3 Pistol Brace FDE (SBA3X-01-SB)
- Mil-spec 6-position carbine buffer tube
- Carbine buffer
- Carbine buffer spring
- Castle nut
- End plate
- Complete mil-spec lower parts kit (all fire control and lower components)
| Weight | 3 lbs |
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What’s included in this build kit?
This kit includes the SB Tactical SBA3 Pistol Brace in FDE (model SBA3X-01-SB), a mil-spec 6-position carbine buffer tube assembly (buffer tube, carbine buffer, buffer spring, castle nut, and end plate), and a complete mil-spec lower parts kit covering all fire control and lower assembly components.
Will this fit my AR-15 or AR pistol lower?
Yes. The SBA3 mounts to any mil-spec carbine receiver extension, and the LPK and buffer tube assembly are dimensioned to mil-spec standards compatible with any standard AR-15 or AR pistol lower receiver.
How many positions does the SBA3 adjust to?
The SBA3 is 5-position adjustable. It collapses to 6.1″ and extends to 9.5″.
How much does the SBA3 weigh?
The SBA3 brace itself weighs 6.75 oz. It is one of the lightest 5-position pistol braces available at this profile.
Is a pistol grip included?
Yes. The complete mil-spec lower parts kit includes the pistol grip and grip screw along with all other lower assembly components.
What’s NOT included?
This kit does not include the stripped lower receiver, upper assembly, barrel, or any other components. You will need a stripped AR pistol lower to use these parts.
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