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Questions & Answers
Is this aluminum or polymer? In the description says it’s both.

It is both- the strut is made of aluminum, while the actual rear “brace” part is polymer.

by kpgunguy, Verified Owner, February 23, 2025
Customer Reviews
Helpful Positive Review
Well made, Sig quality. by Shoe, Verified Owner, November 13, 2024
The brace fit my MPX perfectly. It installed in minutes. I am really happy with the quality. It feels well made.
3/3 found this helpful
Helpful Positive Review
Works like Expected by Chris Bullock, Verified Owner, August 5, 2025
A little overpriced but hey all pistol braces are these days...but overall its fit and function is exactly what I expected it to be...mounts with the 1913 pic rail and has a lil button on the left side that has to be pushed for it to fold...I've only...
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1/1 found this helpful
Helpful Positive Review
Excellent Folder by thewong1, Verified Owner, September 15, 2025
The Sig folding brace is a very solid piece. There is no play/movement from the hinged point and the brace stays in position when locked. The pad will rotate around the frame but isn’t really an issue when using. I appreciate the fact that there’s no...
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1/1 found this helpful
Most Recent Reviews
A sharp smack with a mallet helps. by Pedro, Verified Owner, November 6, 2025
I previously rated this product with two stars because of the difficulty folding it. I have since tried the advice of a internet poster suggesting a sharp whack with a mallet would break it loose. It did indeed. It folds and unfolds now quite nicely....
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Most Recent Reviews
Impossible to fold by Pedro, Verified Owner, November 5, 2025
While this brace is sturdy, it's downright impossible to fold. I have researched the internet to try to find what I might be doing wrong and it appears to be a common issue. Many complaints center around the difficulty unfolding it but since I have y...
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Most Recent Reviews
Sig quality pistol brace. by Alex, Verified Owner, July 11, 2025
Better than the knockoffs… you can’t beat Sig original equipment. Functions as it should.
Read All 8 Reviews

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Product Info for SIG SAUER Fixed/Folding Pivoting Contour Brace w/ Locking Hinge

SIG SAUER factory PCB kit installs easily on your SIG MPX or SIG MCX via the receivers 1913 interface. Comes with a forearm strap, providing a more stabile target shooting experience.image

Incorporates a locking hinge mechanism to securely fasten the brace against the pistol when not in use, and locked when folded out, preventing any swinging movements.

Specifications for SIG SAUER Fixed/Folding Pivoting Contour Brace w/ Locking Hinge:

Manufacturer: SIG SAUER
Gun Type: Pistol
Gun Make: SIG Sauer
Gun Model: SIG Sauer MCX, SIG Sauer MPX
Length: 9 in
Weight: 10.8 oz
Max Width: 1.75 in
Cavity Depth: 1.75 in
Strap Width: 8 in
Stock/Brace Material: 7075 Aluminum
Condition: New

1913 interface Folding

Package Contents:

  • SIG SAUER Fixed/Folding Pivoting Contour Brace w/ Locking Hinge

SIG SAUER Fixed/Folding Pivoting Contour Brace w/ Locking Hinge Orderable Models

List of Orderable Models

  • SIG SAUER Fixed Folding Buttstock w/ Locking Hinge, Coyote, 8901673 , MPN: 8901673 , UPC: 798681698707 , Code: SD9-SBF-8901672-8901673
  • SIG SAUER Fixed Folding Buttstock w/ Locking Hinge, Black, 8901672 , MPN: 8901672 , UPC: 798681698691 , Code: SD9-SBF-8901672-8901672

SIG SAUER Fixed/Folding Pivoting Contour Brace w/ Locking Hinge Unavailable & Discontinued Models

List of Unorderable Models

  • USED, SIG SAUER Fixed Folding Buttstock w/ Locking Hinge, Black, 8901672 , MPN: 8901672-EDEMO , Code: SD9-SBF-8901672-8901672-EDEMO-IN-D
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