Description
The MDT 2-Way Lock Fixed to Fixed Folding Adapter drops in between your chassis and buttstock to add folding capability to most bolt-action chassis rifles running an AR-style interface. This is the Fixed to Fixed version, meaning it works with MDT's tear drop shaped stock interface on both the chassis and the stock side. The 2-way locking design does two jobs: it holds everything tight and straight when you're shooting, and it keeps the stock locked shut once you fold it so nothing flops around in the truck or the case.
MDT builds this thing out of anodized aluminum with solid steel locking components, which is a big reason it feels so rigid when it snaps into place. That solid lockup matters on a precision rig, since any slop at the stock-to-chassis joint can nag at your consistency. Folded up, the adapter shortens your overall footprint for storage and travel, and open it goes right back to a tight, repeatable position.
What the MDT 2-Way Lock Adapter Actually Changes on Your Rifle
A couple of things worth knowing before you order. This adapter adds about 1.75 inches to your length of pull, so if your setup already fits you long, factor that in. It also has a solid interface that will not let a bolt pass through, so it's meant for chassis rifles rather than pulling the bolt straight back through the stock. Double-check your rifle's configuration for clearance before you commit.
Picking the Right MDT Folding Adapter Interface
MDT offers these in several interface combos to match whatever you've got. Fixed refers to the tear drop shaped interface, while Carbine refers to the round one, so this Fixed to Fixed model is the pick when both your chassis and stock use the tear drop shape. Installation follows MDT's standard folding adapter process, and there's a manual and video from MDT if you want to walk through it step by step. Note that it isn't compatible with the TAC21, ESS, or ACC chassis, since those have their own folding solutions.
Key Specifications
- Manufacturer: MDT
- Manufacturer Part Number: 102616-BLK
- UPC: 709951107256
- Interface: Fixed to Fixed
- Locking Configuration: 2-Way Locking
- Added Length of Pull: 1.75 inches
- Material: Anodized aluminum with steel locking components
- Color: Black
- Compatibility: Most bolt-action chassis with an AR-style buttstock interface
- Bolt Pass-Through: No, solid interface
What’s Included
- MDT 2-Way Lock Fixed to Fixed Folding Adapter
Frequently Asked Questions
What does the 2-way lock on the MDT folding adapter do?
The 2-way lock holds the stock solid and straight when you're in the open shooting position, which keeps your setup consistent. It also locks the stock securely in the folded position so it stays put during storage and transport. That second function is the main difference between this and the 1-way version, which only locks in the open position.
Will the MDT Fixed to Fixed folding adapter fit my rifle?
It's designed for most bolt-action chassis rifles that use an AR-style buttstock interface. This particular model uses the Fixed to Fixed setup, meaning MDT's tear drop shaped interface on both the chassis and the stock. It is not compatible with the TAC21, ESS, or ACC chassis, so check your chassis interface shape before ordering.
How much length does the folding adapter add?
The adapter adds about 1.75 inches to your length of pull. If your rifle already fits you on the longer side, keep that in mind, since you may want to adjust or shorten your stock to compensate. On adjustable stocks this is an easy fix, but it's worth planning for.
Can the bolt pass through the folding adapter?
No. This adapter has a solid interface and will not allow a bolt to pass through it. Make sure your rifle's configuration doesn't rely on running the bolt back through the stock before you install it.





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