Description
The Midwest Industries MI Arm Brace 1913 Fixed Stock is built for anyone running a 1913 Picatinny rear rail who wants a sturdy, fixed-position setup without the wobble you get from cheaper options. The main body is machined from hard coat anodized 6061 aluminum, so it holds up to abuse and shrugs off corrosion, while the polymer cheek piece and rubber butt pad give you real comfort where your face and shoulder make contact. It adds about 8.75 inches to your overall length and only tips the scale at 8 ounces complete, which keeps your firearm feeling balanced.
What Makes the MI 1913 Fixed Brace Worth Bolting On
The standout here is rigidity. Because it locks to a Picatinny rail in a fixed position, there's no play or rattle to fight, and that translates to a consistent cheek weld shot after shot. The aluminum backbone paired with Midwest Industries' own cheek piece and butt pad means you're getting a brace that feels solid in hand rather than hollow and cheap. It's a straightforward, purpose-built piece that does exactly what it says.
Sling Options and Setup on the Arm Brace Fixed
You get five QD sling attachment points spread across the brace, so you can rig up a single-point, two-point, or side-mount configuration depending on how you carry and shoot. A Velcro strap ships in the box for a bit of added retention when you need it. Installation is simple for anyone already running a 1913 rail adapter on their platform.
Who Should Grab the MI-ARM-F
This one suits AR pistols, AK-pattern builds, and other compact platforms wearing a 1913 rear rail where a folding stock isn't needed or wanted. Note that it's designed for firearms with a Picatinny attachment and is not intended for setups running a traditional buffer assembly. If you want a clean, durable, made-in-the-USA fixed brace that just works, the MI 1913 Fixed is an easy call.
Key Specifications
- Manufacturer: Midwest Industries
- Manufacturer Part Number: MI-ARM-F
- UPC: 812102035268
- Color: Black
- Product Type: Fixed
- Attachment: 1913 Picatinny
- Main Material: Hard Coat Anodized 6061 Aluminum
- Contact Points: Polymer Cheek Piece and Rubber Butt Pad
- QD Sling Attachments: 5
- Added Length: 8.75 in
- Overall Length: 11.1 in
- Assembly Weight: 8 oz
- Style: Factory Replacement
- Country of Origin: USA
What’s Included
- Midwest Industries MI 1913 Fixed Arm Brace
- Velcro retention strap
Frequently Asked Questions
What does the MI 1913 fixed arm brace attach to?
It's built for firearms that have a 1913 Picatinny rear rail attachment. That covers a lot of AR pistols, AK-pattern builds, and other compact platforms running a rail adapter. It is not designed for firearms using a traditional buffer assembly.
How much length and weight does the arm brace fixed add to my firearm?
It adds roughly 8.75 inches to your overall length, with an overall brace length around 11.1 inches. The complete assembly weighs about 8 ounces, so it stays light and won't throw off the balance of a compact build.
How many sling mounting options does it have?
The MI-ARM-F comes with five QD sling attachment points positioned around the brace. That gives you the flexibility to run a single-point, two-point, or side-slung setup. A Velcro strap is also included for added retention.
What is the MI 1913 fixed brace made of?
The main structure is machined from hard coat anodized 6061 aluminum for rigidity and corrosion resistance. Midwest Industries adds their own polymer cheek piece and rubber butt pad for comfort at the contact points. It's a made-in-the-USA piece with a solid, no-rattle feel.




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