Description
There are plenty of 1913-mount stocks out there, but the Magpul UCS pulls together folding, length adjustment, and cheek riser tuning in one package that works across a bunch of different hosts. If your receiver has a vertical M1913 Picatinny rail on the back instead of a buffer tube, this is built to bolt right up and let you fit the gun to you instead of the other way around.
What Sets the Magpul UCS Apart
The big draw here is adaptability. The reversible hinge lets you fold left or right depending on your charging handle, ejection port, and control layout, and the five degrees of drop gives clearance so the folded stock stays out of the way. Length of pull runs across six positions for three inches of total travel, adjusted with buttons on either side, so it fits you whether you're in a t-shirt or loaded up in a plate carrier. From front to back the stock spans roughly 7.6 to 10.6 inches, with exact LOP depending on your platform.
Dialing In Your Cheek Weld with the UCS
Getting behind glass matters, and the UCS ships with two reversible cheek risers, a 0.50 inch and a 0.75 inch. Pair those with the reversible M1913 clamp, which allows a half-slot of height adjustment on the rail, and you can nudge your head placement up or down until the sight picture lines up right, whether you're running iron sights, a red dot, or a taller LPVO or night vision setup.
Built for Real Platforms
This is a solid, no-drama stock that owners tend to run on hosts like the SIG MCX and MPX, FN SCAR, IWI Galil, CZ Scorpion, Ruger LC Carbine, Brownell's BRN-180, and various AK variants such as the PSA AK. It weighs in around 18 ounces and locks up positively, which folks appreciate on guns where a stable, repeatable cheek weld counts. A reversible anti-rotation QD sling socket and the MOE SL Enhanced Rubber Butt-Pad round it out for carry and shooting comfort. Made in the USA.
Key Specifications
- Manufacturer: Magpul Industries
- Model: Universal Carbine Stock (UCS)
- Manufacturer Part Number: MAG1441-FDE
- UPC: 840815149279
- Color: Flat Dark Earth
- Finish: Matte
- Material: Polymer
- Mounting Interface: 1913 Picatinny Rail (rear vertical rail)
- LOP Adjustment: Six positions, 3 inches total travel
- Overall Length Range: 7.6 to 10.6 inches
- Drop Angle: 5 degrees
- Cheek Risers Included: 0.50 inch and 0.75 inch, reversible
- Height Adjustment: Reversible M1913 clamp, 1/2-slot
- Weight: 18 oz
- Sling Mount: Reversible anti-rotation QD socket
- Country of Origin: USA
What’s Included
- Magpul UCS Universal Carbine Stock (FDE)
- 0.50 inch reversible cheek riser
- 0.75 inch reversible cheek riser
- MOE SL Enhanced Rubber Butt-Pad (0.70 inch)
- Reversible M1913 clamp
Frequently Asked Questions
What firearms will the Magpul UCS fit?
The UCS works with any receiver that has a vertical M1913 Picatinny rail on the rear instead of a buffer tube, along with receivers using a 1913 aftermarket adapter. That covers popular platforms like the SIG MCX and MPX, FN SCAR, IWI Galil, CZ Scorpion, Ruger LC Carbine, Brownell's BRN-180, and certain AK variants such as the PSA AK. As long as your host has that rear rail interface, it's a candidate.
Can the Magpul UCS fold to either side?
Yes. The hinge is reversible, so you can set it up to fold left or right depending on your charging handle, ejection port, and control layout. It also has five degrees of drop built in to keep the folded stock clear of those parts.
Does the UCS come with cheek risers?
It ships with two reversible cheek risers, a 0.50 inch and a 0.75 inch. Combined with the half-slot height adjustment on the reversible 1913 clamp, you can fine-tune your head placement for a clean sight picture with irons, a red dot, or a taller optic like an LPVO or night vision setup.
How much length of pull adjustment does the Magpul UCS offer?
The UCS gives you six positions across three inches of total length of pull travel, adjusted with push buttons on either side. The exact LOP range depends on your platform, but overall length runs from about 7.6 to 10.6 inches, which lets you set it up comfortably with or without body armor.





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