MDT M-LOK Adjustable Thumb Rest – Precision Rifle Chassis Accessory
The MDT M-LOK Adjustable Thumb Rest provides a comfortable, repeatable contact point for the support hand on compatible precision rifle chassis, stocks, and handguards.
Designed for competition shooters, hunters, and precision rifle enthusiasts, the MDT 106900-BLK combines adjustable positioning, aggressive molded texture, and lightweight polymer construction in a compact ergonomic accessory.
Weighing just 0.32 ounces, this adjustable thumb shelf attaches to a standard M-LOK slot and can be positioned on either side of compatible rifle systems.
Consistent Hand Position & Improved Rifle Control
Consistent hand placement is an important part of comfortable, repeatable rifle handling, particularly when shooting from barricades, bags, tripods, or other supported positions.
The MDT Adjustable Thumb Rest provides a dedicated support-hand contact point, helping shooters maintain a familiar grip position across different shooting positions.
Its textured surface provides additional traction, while the adjustable angle allows the thumb rest to accommodate individual hand positions and preferences.
This small accessory is particularly useful for shooters who prefer a defined thumb shelf rather than resting their support hand against a smooth chassis surface.
Adjustable Angle for Personalized Ergonomics
Unlike a fixed-position thumb shelf, the MDT M-LOK Thumb Rest features an adjustable angle that allows users to tailor its orientation to their preferred grip.
The adjustment accommodates different hand sizes, chassis geometries, and shooting preferences.
Its aggressive molded texture helps maintain a secure thumb contact point without requiring an oversized accessory.
Universal M-LOK Compatibility
The MDT 106900-BLK attaches to a standard M-LOK mounting slot, allowing it to be used with a wide range of compatible chassis systems, stocks, and handguards.
It is not limited to MDT-branded equipment.
- MDT ACC Elite: Compatible where an appropriate M-LOK mounting slot and clearance are available.
- MDT ACC Premier: Suitable for configurations with accessible standard M-LOK slots.
- MDT HNT26: Can be used with compatible M-LOK mounting locations.
- MDT LSS Chassis: Fits configurations with standard M-LOK accessory slots.
- Other Chassis & Handguards: Compatible with appropriately positioned standard M-LOK mounting interfaces.
The thumb rest supports left- or right-side mounting, making it suitable for both right- and left-handed shooters.
Fitment Note: Compatibility depends on the presence of a standard M-LOK slot and adequate clearance around the desired mounting location. Not every chassis or stock provides an appropriate mounting position.
Lightweight High-Strength Polymer Construction
The MDT Adjustable Thumb Rest is manufactured from high-strength polymer, providing a lightweight accessory with a textured contact surface.
At approximately 0.32 ounces, it adds minimal weight to competition or hunting rifle configurations.
The thumb rest protrudes approximately 1 inch from its mounting surface and includes the required mounting hardware.
Explore Compatible MDT Precision Rifle Chassis
Pete's Pillars offers a selection of premium MDT chassis systems that support M-LOK accessories in compatible mounting locations.
Complementary MDT Chassis Accessories
Complete your rifle's ergonomic setup with additional precision shooting accessories available from Pete's Pillars.
Features & Benefits
- Adjustable Thumb Shelf: Customizable angle for individual hand positioning.
- Standard M-LOK Mount: Compatible with appropriately equipped rifle chassis, stocks, and handguards.
- Ambidextrous: Supports left- or right-side installation.
- Aggressive Grip Texture: Molded surface provides additional thumb traction.
- High-Strength Polymer: Durable, lightweight construction.
- Only 0.32 oz: Minimal addition to overall rifle weight.
- Approximately 1" Protrusion: Compact contact surface.
- Mounting Hardware Included: Supplied with required installation components.
Product Specifications
- Manufacturer: MDT – Modular Driven Technologies
- Product: M-LOK Adjustable Thumb Rest
- Manufacturer Part Number: 106900-BLK
- UPC: 990482713973
- Material: High-Strength Polymer
- Color: Black
- Mounting Interface: Standard M-LOK
- Orientation: Ambidextrous
- Adjustment: Adjustable Thumb Rest Angle
- Surface: Aggressive Molded Texture
- Weight: Approximately 0.32 oz
- Protrusion: Approximately 1"
- Included: One Adjustable Thumb Rest and Required Mounting Hardware
Compatibility Note: Requires an appropriately located standard M-LOK mounting slot. Confirm clearance and mounting suitability for your individual chassis, stock, or handguard.
The Pete's Pillars Difference
Pete's Pillars is an authorized MDT dealer, offering genuine MDT chassis accessories, premium precision rifle components, and our own American-made upgrades.
From small ergonomic improvements to complete MDT competition and hunting chassis systems, our catalog brings together practical accessories for shooters who value quality construction and thoughtful engineering.
Genuine MDT products. Real parts. Made by real people.
