Description
Midwest Industries has a reputation for machining parts that just plain work, and the Arm Brace Side Folding in Flat Dark Earth fits right in with that lineup. It bolts onto any firearm with a Picatinny attachment point and gives you a compact folding setup without the wobble and slop you get from cheaper braces. The whole thing runs about 14.2 ounces assembled, so you get real strength without hanging a bunch of extra weight off the back of your gun.
What Sets the MI Side Folding Arm Brace Apart
The heart of this brace is a heavy-duty side-folding mechanism cut from 4140 heat-treated steel with a full-length locking lug. That lug plus a steel clamp with large surface engagement means you get positive, no-nonsense lockup in both the open and folded positions. There's no rattle when it's deployed and no flopping around when it's tucked away, which is exactly what you want on a folder that's going to see repeated use.
Built to Take a Beating
The main body is hard-coat anodized 6061 aluminum, and the steel components wear a mag phosphate finish for corrosion resistance. Extended, it adds roughly 9 1/8 inches to your overall length, and folded it only tacks on about 0.75 inches, which makes for a genuinely packable setup in a bag or case. The brace can be configured for right or left side folding, so it'll work whether you're running optics, a cheek weld, or just want the ejection port clear when it's folded.
Carry Options on the MI Arm Brace
Five QD sling attachment points are built right in, giving you plenty of flexibility for how you sling and carry. Owners consistently point to the rugged build quality and clean machining, and the strong lockup gets called out again and again. If you've been running MI rails or handguards already, this brace keeps that same tank-built feel across your platform.
Key Specifications
- Manufacturer: Midwest Industries
- Manufacturer Part Number: MI-ARM-SF-FDE
- UPC: 812102035350
- Color: Flat Dark Earth (FDE)
- Body Material: Hard-Coat Anodized 6061 Aluminum
- Folding Mechanism: 4140 Heat-Treated Steel with Full-Length Locking Lug
- Steel Finish: Mag Phosphate
- Mounting: Picatinny
- Fold Configuration: Right or Left Side Folding
- QD Sling Points: 5
- Added Length (Extended): 9 1/8 in.
- Added Length (Folded): 0.75 in.
- Assembly Weight: 14.2 oz.
What’s Included
- Midwest Industries Arm Brace Side Folding (FDE)
- Velcro strap
Frequently Asked Questions
What does the Midwest Industries Side Folding Arm Brace mount to?
It's designed to attach to firearms with a Picatinny attachment point on the rear. The steel clamp engages a large surface area for a secure, repeatable fit. If your platform accepts a Picatinny-mounted brace or stock, this one drops right in.
Can the arm brace be set up to fold left or right?
Yes. The side-folding mechanism can be configured for either right or left side folding, so you can set it up around your optic, charging handle, or ejection port. That flexibility lets you keep the folded profile out of your way no matter how your gun is built.
How much length does the brace add folded versus extended?
Extended, it adds about 9 1/8 inches to your overall firearm length. Folded, it only tacks on roughly 0.75 inches, which makes for a compact package in a bag or case.
Is the lockup solid, or does it wobble like cheaper folders?
The 4140 heat-treated steel mechanism uses a full-length locking lug and a steel clamp for positive lockup in both positions. Owners regularly call out how strong and rattle-free the lockup feels. It's built to hold tight through repeated folding and use.





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