Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
SB Tactical SBA4 Stabilizing Brace for Mil-Spec Carbine Extension Platforms
Currently Unavailable View Product
Compare (0)
Most Helpful Positive Review Great brace, but not notably better than SAB3
I have an SAB3 and I really like it very smooth and easy to use. This brace came to me so stiff I nearly needed tools to break it loose. It was stiff. I put the 3 and 4 side by side and I cant really say I noted anything better the 4. I actually found the 3 easier to change positions with. I would...
Read More...
Most Helpful Negative Review Almost a step backwards in styling...and the lightning cuts on the lever won't help that....
This is very well made, but the rubber straps on the sides are a "No" for me (similar to their earlier braces). They provide some stability, but not enough when shooting to make me ditch the SBA3 - which I love. I have the VSeven custom strap and it keeps the rubber on the rear of the stock from c...
Read More...
Show
Sort by
Filter by

sba4 is best brace option

by Jjack, Verified Owner from PA, United States Written on September 8, 2021
This brace is my favorite. Prefer this over the SBA3 as it feels more stable and offers me a better cheek weld. Stay away from the SBM4 which is not adjustable and requires a smooth buffer tube. This SBA4 to me is close enough to a stock that I see no reason for me, at least now, to SBR/form1 my AR pistol.
Pros:
  • Comfort
  • Stability
  • Price and install ease
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

great brace

by BigFloppa, Verified Owner from WA, United States Written on August 14, 2021
This brace fits nice and snug on the buffer tube with no rattle. The weight of it helps offset the rest of the gun. The fins don’t split at all like they do on the SBA3. I do wish that the strap was a little longer. I like that the QD point is farther forward. It helps keep the gun closer to your chest when running the sling mount on the opposite side of the brace.
Would recommend: Yes
Was it helpful to you? Yes | No

SB Tactical SBA4 Brace

by Blank, Verified Owner from PA, United States Written on July 29, 2021
This is one of the most comfortable braces I have bought. Compared to the SB Tactical SBA3 this has a connecting piece that makes it more stock like, but is still maintained as a brace. It comes with an adjustable buffer tube as well. Overall this is the best brace on the market.
Would recommend: Yes
Was it helpful to you? Yes | No

Better than SBA3

by Ken, Verified Owner from NJ, United States Written on July 5, 2021
I first got the SBA3 as part of a lower combo from American Defense Manufacturing. I read some reviews online saying that SBA4 has harder rubber and therefore provides better shoulder support. I took a leap of faith and bought one in FDE color. Man, the SBA4 is markedly better than 3. The FDE color matches perfectly with the Magpul pistol grip and rail which are both in FDE.
Pros:
  • Appearance
  • Function
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

Solid brace

by Plinker, from TX, United States Written on June 23, 2021
Excellent brace for your next PCC. Installation on my AR9 was smooth and quick. Brace has enough range of motion to fit just about any shooter. Durably built for even the competition environment. Will be interesting to see how it holds up over time in the sun.
Would recommend: Yes
Was it helpful to you? Yes | No

Sloppy loose fit

by Jet-thro, from MD, United States Written on June 6, 2021
Purchased this for my first pistol build. Initial critique regards the brace's loose and sloppy fit. Other than that it seems to be a nice product. Optics Planet delivered the product in a reasonable time despite the issues they are having and give notice about it.
Pros:
  • stabilizing gussets
Cons:
  • loose sloppy fit on tube.
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Sba4 brace

by KJ Beaton, Verified Owner from FL, United States Written on June 2, 2021
Solid construction overall. Feels and looks great. Slightly heavier than sba3 however more solid feeling. If 3oz. More on your build Isnt a concern this is a better brace in my opinion over the sba3. I would recommend this brace
Would recommend: Yes
Was it helpful to you? Yes | No

SBA4 Stabilizing Brace

by Joebob, from AZ, United States Written on May 28, 2021
The brace arrived in a timely manner and was exactly the product that was described. It fit perfectly and is easily configured for left or right hand use. It appears sturdy enough and so far has held up well.
Would recommend: Yes
Was it helpful to you? Yes | No

beware when final sale

by slewfoot, Verified Owner from VA, United States Written on May 24, 2021
i see what final sale means rubber brace was not sealed to upper so must be factory seconds for such a low price with no returns so make sure you have a way to re glue where it was separated using cv glue with a good clamp
Would recommend: No
0 of 1 found the following review helpful.
Was it helpful to you? Yes | No

CQB Perfection

by 715 Tactical, from WI, United States Written on May 19, 2021
You want to talk about the perfect brace for CQB scenarios. Well..this is it. SB Tactical never fails to deliver the top quality product that we in the 2a community have come to know. I used to prefer the sba3 when it came to braces but I think this is my new favorite. I wil continue to buy this brace for my builds.
Pros:
  • durable
  • CQB
Cons:
  • It's a brace
Best Used for:
  • AR Pistols
Would recommend: Yes
Was it helpful to you? Yes | No
There are no reviews that match your criteria. Would you like to review this product?