• Heavy-duty side-folding mechanism constructed from 4140 steel
  • Full-length locking lug for maximum strength
  • Decrease the weapon's overall length, and make it easier to carry or store
  • Solid positive lock up in both positions
  • Steel clamp with large surface engagement
  • Can be configured to right or left folding
  • Modular design can accommodate different stock attachments
  • Features a Mil-Spec diameter aluminum stock tube that is hard coat anodized (1.145 Diameter)
  • Stock tube features waterproof storage compartment
  • Adds 7.375 inches to overall firearm length
  • Adds 0.75 inches to the firearm in the folded position
  • Complete assembly weight: 13.4 oz.
  • Steel parts are phosphate finished
  • 100% made in the USA


  • Material:
    • Side Folding Adapter: 4140 Steel
    • Stock Tube: 6061 Aluminum
  • Finish:
    • Side Folding Adapter: Phosphate
    • Stock Tube: Anodized
  • Weight: 13.4 oz.
  • Outer Diameter: 1.145"
  • Length: 7.25"


  • Any weapon accepts 1913 Picatinny interface stock such as the Sig MPX/MCX

*Many States and localities regulate the use or possession of collapsible and folding stocks. Use or possession of this product in conjunction with certain other parts may be illegal in some jurisdictions. Please ensure your use of this product complies with all Federal, State, and local laws and regulations before purchase.


  • 1x Midwest Industries Side Folding Stock Adapter with Mil-Spec Tube
  • 1x Mil-Spec Tube End Cap
  • 2x Allen Wrenches


The Midwest Industries side folding stock adapter offers tactical benefits and durability to meet the needs of serious shooters.

Offers Custom And Tactical Benefits That You Need

This side folding stock adapter can fold to the left or right as required. When the stock is folded to the side, it decreases the weapon's overall length. Therefore, it will be easier to carry or store.

The stock adapter features a modular design, ideal for attachments to enhance your response to your mission.

There is a waterproof storage area in the stock tube for small parts.

Engineered For Durability

Midwest Industries knows that you need your weapon of choice to be as durable as possible for your attack readiness to be on point.

To deliver the durability customers require, they created a tough folding mechanism and a locking lug that extends to the full length possible.

They strategically chose to construct this stock adapter with 4140 steel, then finished with a hard coat anodized layer of mag phosphate to provide additional protection.

Two Allen wrenches are included with your purchase to help streamline the installation process.

Important: research your local laws regarding folding and collapsible stocks before purchase. Using or possessing this product may not be legal, depending upon the location of your residence.

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