MDT Folding Stock Adapter Fixed to Fixed – 2-Way Locking
The MDT Folding Stock Adapter Fixed to Fixed – 2-Way Locking adds greater flexibility to compatible bolt-action chassis rifles with an AR-style stock interface. Designed for improved storage, transport, and stock configuration options, this folding adapter allows the buttstock to fold while maintaining a secure connection to the chassis.
The 2-way locking configuration provides secure locking in both the shooting and folded positions. When deployed, the adapter maintains solid straight-line integrity between the chassis and buttstock. When folded, the additional locking function keeps the stock securely in position for easier storage and transportation.
The adapter adds approximately 1.75 inches to the length of pull, making it important to consider stock position and overall rifle configuration before installation.
1-Way vs 2-Way Locking
MDT folding stock adapters are available in 1-way and 2-way locking configurations.
The 1-way locking adapter maintains solid, straight-line integrity when the rifle is in the shooting position. The 2-way locking adapter adds the ability to securely lock the buttstock in the folded position, providing additional convenience for storage and transport.
This model features the 2-way locking configuration.
Available Interface Configurations
MDT folding stock adapters are available for different chassis and buttstock combinations:
- Fixed to Fixed
- Carbine to Carbine
- Fixed to Carbine
- Carbine to Fixed
The correct adapter configuration depends on the interface shape of your chassis and the type of buttstock you intend to use.
Fixed vs Carbine Interfaces
MDT uses the terms Fixed and Carbine to identify the interface between the chassis and buttstock.
Fixed interfaces are identifiable by their tear-drop-shaped stock interface, while Carbine interfaces use a circular-shaped stock interface.
Selecting the correct folding stock adapter therefore depends primarily on the interface on your chassis and the interface required by your buttstock.
Compatibility
The MDT Folding Stock Adapter Fixed to Fixed is designed for compatible chassis systems using a fixed-style interface and compatible fixed-style buttstocks.
The adapter features a solid interface and does not allow a bolt to pass through the adapter. Always verify your rifle and chassis configuration before purchasing or installing the adapter.
Not Compatible With
- MDT TAC21 chassis
- MDT ESS chassis
- MDT ACC chassis
The ESS and ACC chassis have their own compatible folding buttstock solution.
Product Specifications
| Specification | Details |
|---|---|
| Product Type | Folding Stock Adapter |
| Configuration | Fixed to Fixed |
| Locking System | 2-Way Locking |
| Chassis Interface | Fixed |
| Buttstock Interface | Fixed |
| Application | Compatible bolt-action chassis rifles with AR-style interfaces |
| Folding Function | Yes |
| Folded Position Lock | Yes |
| Shooting Position Lock | Yes |
| Added Length of Pull | Approximately 1.75″ |
| Interface Type | Solid Interface |
| TAC21 Compatible | No |
| ESS Compatible | No |
| ACC Compatible | No |
Upgrade Your Rifle Configuration
The MDT Folding Stock Adapter Fixed to Fixed – 2-Way Locking provides a practical way to add folding functionality while retaining a secure connection between the chassis and buttstock. It is particularly useful when easier storage and transportation are important, while also giving shooters more flexibility when selecting compatible buttstocks.
Before ordering, confirm that your chassis uses the fixed interface and that your chosen buttstock is compatible with the fixed-to-fixed configuration.

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