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Questions & Answers
What is different between the MCX and MPX brace that makes them not interchangeable?

I can attest that this will work with both the MCX and MPX - but specifically on on an MPX Gen 3 (M-lok with upgraded gas block). I can't speak for earlier versions.

No question that the fitment on the MCX is perfect: slide-through and mounting are flush, and the top of the rail mount lines up perfectly with the end-taper on the top of the Pic-rail for the MCX. For the MPX, not so much - part of the receiver's pic-rail will show, but it will mount and slide in perfectly without issue. THE ONLY CAVEAT is that once you torque the screw down, you'll find that it will thread into the rail, as it seems the guides on the MPX and MCX rails are slightly different. But --- no mallet nor press required! Just... don't be upset if your pic-rail doesn't look "mint" anymore. (Not that anyone can really see this.) Also, if you're one who depends on the MPX mounting holes for the side-mounted QD piece, the pic-rail mount on this brace will cover up those mounting holes. Not a huge loss, since the QD mount position on the brace is infinitely worlds better from a placement perspective anyway. (At least, IMO, and especially for single-point sling usage.)

Hope this helps. Still easily the best, sturdiest, and sharpest-looking collapsible brace/stock system for the MPX/MCX. (And I have three of these, FWIW.)

by slippercream, Verified Owner, March 27, 2021
Will this work with a ar15 & its bcg spring etc or will i need to get new springs parts etc, if yes what ? Expert Answer

This brace would require Maxim Defense's proprietary spring and buffer.

by Kurt Colbourne, Gear Expert, September 1, 2021

Product Discontinued by Manufacturer

Maxim Defense Industries PDW Brace for MCX has been discontinued by Maxim Defense Industries and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Gun Parts, Rifle Parts, Firearm Braces yourself to try and find the perfect replacement for you!

Product Info for Maxim Defense Industries PDW Brace for MCX

PDW BRACE FOR SIG MCXimage

The toughness of Maxim Defense PDW Braces are available for your SIG MCX rifles. Built with the same functionality and durability as our PDW Stock for AR-15, your MPX or MCX finally have a PDW brace option suited for real-world use. Solid attachment, quick deployment, built-in sling mount, and 5-positions of adjustment make this the perfect choice for your hard-use carbine and subgun.

Built for duty Rapid deployment Full auto compatible

NOTES:

The Maxim PDW Brace for SIG MPX and MCX are NOT interchangeable.

Each PDW Brace comes with a QD sling mount installed and also ships with a D-Ring sling mount for user preference.

Extension tube doubles as water tight storage

Features of Maxim Defense Industries PDW Brace for MCX

  • SPECS
  • FEATURES:
  • Extended Cheek Weld, Easily installs on SIG MCX lowers, Extension tube doubles as water tight storage, Each CQB Stock comes with a QD sling mount installed and also ships with a D-Ring sling mount for user preference.
  • WEIGHT:
  • 17.7 ounces
  • LENGTH:
  • 4.1875 inches closed
  • 5.375 inches 1st position
  • 6.5625 inches 2nd position
  • 7.75 inches 3rd position
  • 9 inches fully extended
  • MATERIAL:
  • 7075 Aluminum Alloy housing for optimal performance with QD mounts
  • Color
  • Black

Package Contents:

  • Maxim Defense Industries PDW Brace for MCX
  • SCW Pistol Brace for MCX

Related Products to Maxim Defense Industries PDW Brace for MCX

Maxim Defense Industries PDW Brace for MCX Unavailable & Discontinued Models

List of Unorderable Models

Maxim Defense Industries PDW Brace for MCX, Black, MXM-47696 , MPN: MXM-47696 , UPC: 680017476960 , Code: MDI-SBC-PDWBMCX-MXM-47696
Maxim Defense Industries PDW Brace for MCX, FDE, MXM-47697 , MPN: MXM-47697 , UPC: 680017476977 , Code: MDI-SBC-PDWBMCX-MXM-47697
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