Picatinny Thumb Rest Thumb Shelf Precision Rifles - Free 3D Print Model

Description

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Short Description

Compact Picatinny-mounted thumb rest designed to improve rifle control, consistency, and ergonomics during supported or unsupported shooting.

Provides a comfortable and repeatable thumb position for better weapon handling and recoil management.

Full Description

This model is a compact thumb rest / thumb shelf designed for rifles equipped with a standard Picatinny rail.

It was mainly designed for precision-oriented shooting setups, DMRs, and tactical-style rifles, but also works very well on AR platforms and similar systems.

The ergonomic curved surface gives the support hand a natural and repeatable resting point, helping with:

Rifle control
Hand positioning consistency
Comfort during long range sessions
Better leverage during positional shooting
Improved weapon indexing

The shape was intentionally kept compact and smooth to avoid snagging while still offering enough surface area for proper thumb placement.

Features

Picatinny rail compatible
Compact low-profile design
Ergonomic thumb support surface
Lightweight
Minimal printing supports required
Suitable for left or right side mounting depending on preference

Printing Recommendations

For best durability and heat resistance:

Recommended Materials

PETG
PETG-CF
PA-CF
PA-GF
Other reinforced engineering filaments

Standard PLA may work for light use or testing, but reinforced materials are strongly recommended for real-world use.

Recommended Print Settings

Nozzle: 0.4 mm
Layer Height: 0.2–0.28 mm
Walls: 4–6
Infill: 40–100%
Supports: Minimal supports only
Orientation: As provided in the files

Disclaimer

This model was designed and tested on my own equipment and functioned well during my testing.

Use entirely at your own risk.

I do not guarantee compatibility, durability, safety, or fitness for any specific application.
3D printed firearm accessories can fail depending on material choice, printer calibration, environmental conditions, and usage.

Always inspect parts before use and ensure safe firearm handling practices at all times.

The user is solely responsible for installation, usage, and compliance with local laws and regulations.

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License

If you want to use this model commercially, please join my membership.

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You may create derivative works based on this object, provided that all such derivative works are published exclusively on the MakerWorld platform and include proper attribution to the original creator. You may not share, upload, host, distribute, or publish this object—or any derivative work of this object—on any other digital platform, marketplace, or distribution channel. Commercial use of this object and any derivative works is strictly prohibited. This includes, but is not limited to, selling, renting, sublicensing, or using the object in any context in which you receive monetary compensation or other financial benefits.