Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

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 FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
SIG SAUER MCX/MPX Folding Stock
Currently Unavailable View Product
Compare (0)
Most Helpful Positive Review Awesome stock!
This is a great stock, both in form and function. But, it is very, very small. It's extremely short, and I highly recommend some type of reduced angle grip it you plan of using this (like a BCM gunfighter, Magpul K2 or Ergo 0° grip). The width (where your cheek goes) is also extremely limited, but you know this going in. The folding mechanism is also extremely tight until you work it in. So tight I had to brace it on a counter several times until it loosened up. This is not an issue as it will loosen up eventually and I want it to be a tight, solid lockup. Glad I purchased it.
Show
Sort by
Filter by

Well made, but hilariously small

by M, Verified Owner from UT, United States Written on March 31, 2025
I bought this for a build of mine. It's made well; I like it. But man, it is so small. It's nearly impossible to use due to its size. Perfect for people with tiny, short arms I guess.
Would recommend: Yes
Was it helpful to you? Yes | No

sig sauer folding stock

by adam, Verified Owner from AR, United States Written on April 13, 2024
Product is awesome, but dealing with DHL is always a terrible adventure. Seems like free shipping means it will get lost in Texas for a month. It eventually got here though.
Would recommend: Yes
Was it helpful to you? Yes | No

MPX folding stock

by Mike, Verified Owner from GA, United States Written on April 5, 2024
Great upgrade - much better feel and look than the factory brace. Includes a QD socket for sling.
Would recommend: Yes
Was it helpful to you? Yes | No

Awesome Quick open stock

by Rock8, from CO, United States Written on March 31, 2024
Super easy and fast. Stays locked down against the gun when not in use. Flips out quick. Oil a little bit before use.
Would recommend: Yes
Was it helpful to you? Yes | No

perfect sbr backpack combo

by Joey, Verified Owner from FL, United States Written on March 27, 2024
Very solid design. Perfect for a backpack or truck gun. Highly recommend. Sig makes an excellent product
Would recommend: Yes
Was it helpful to you? Yes | No

Solded peace of equipment

by Danny, Verified Owner from OH, United States Written on March 16, 2024
Very lightweight. Smooth action. Extremely comfortable will buy again
Would recommend: Yes
Was it helpful to you? Yes | No

A great minimalist stock

by Gregrey Martin, Verified Owner from MO, United States Written on March 15, 2024
Well, it's a stock, you know. And it's by Sig Sauer. I can't say it's made me wax poetic or pine for the good old days. It didn't clean up spots from the carpet or cure cancer. It's a stock. It folds. It attached to the back of a firearm. Naw, I'm just kidding. It's an awesome folding stock that comes from one of the best manufacturers in the firearms business. And the price was excellent.
Best Used for:
  • Sig MCX series and similar
Would recommend: Yes
Was it helpful to you? Yes | No

Looks, feels, and works great on sbr.

by NH, from NH, United States Written on February 2, 2024
Perfect for achieving a light and compact rifle configuration. LOP is a bit short if that is a priority for your application.
Best Used for:
  • Sig MCX
Would recommend: Yes
Was it helpful to you? Yes | No

Sturdy, but Small Butt Pad

by Johnny, Verified Owner from AK, United States Written on January 20, 2024
Purchased the stock for a 300Blk PSA JAKL I was building. Lower is an SBR so I wanted a minimalist style PDW stock for it. Stock is very sturdy, but pretty hefty for what it is. Not a bad thing when it’s on a front heavy piston gun though. My issue came with the size of the butt pad…it’s small. Much smaller than I realized. Wearing just a T-shirt it’s a little sharp on the shoulders. For a 223 or 300Blk it’s fine, but I wouldn’t recommend it for anything of higher caliber/recoil. Length of pull is also a little short, but to be expected for a PDW stock. Lock up is very solid and the folding mechanism is perfect! The only reason I gave 4 stars was just the uncomfortably small butt pad.
Pros:
  • very sturdy
  • Solid lockup
  • Good Unfolding Mechanism
Cons:
  • little heavy
  • Very Small, Sharp Butt Pad
Best Used for:
  • PDW
  • Small Caliber Rifles/PCCs
Would recommend: Yes
Was it helpful to you? Yes | No

MPX Upgrade

by Mpx Guy, from KS, United States Written on January 14, 2024
Perfect addition to the MPX. Wanted the small compact look. And this is perfect all the way around.
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?
Last updated 2025-11-12 UTC.