Ergonomic stock for Sabatti ST18 or BCM

Overview

This 3D-printable ergonomic stock is designed for demanding shooters seeking perfect adaptation of their platform. Unlike traditional fixed stocks that impose a standardized posture, this model offers total modularity with smooth adjustments for length, comb height, and buttpad rotation. Designed for precision shooting, it adapts to the exact morphology of each shooter to guarantee instant optical alignment and absolute comfort on the firing line.

Why use this?

• Custom Ergonomics: Complete adjustment of the Length of Pull (LOP), cheek rest height, and buttpad angle to accommodate any shooting position.

• Robust Design: Engineered to firmly lock every adjustment. Once secured, the structure exhibits no unwanted play, ensuring stability worthy of professional equipment.

• Comfort & Accuracy: Enables perfect, repeatable eye alignment with your scope, reducing muscle fatigue and maximizing overall precision.

• Hybrid & Modular: Can accommodate personalized comfort elements and easily adapts to standard chassis interfaces.

Technical Specifications & Printing

To ensure the safety, rigidity, and longevity of the stock under mechanical stress, high-strength print settings are mandatory.

• Recommended Materials: PETG is ideal for the main structure due to its excellent mechanical resistance and impact flexibility. For optimal comfort, the buttpad and comb cover can be printed in TPU. ABS or Carbon-Fiber-filled Nylon (PA-CF) are also excellent choices for extreme rigidity.

• Layer Height: 0.16mm to 0.2mm for a good balance between layer adhesion and the aesthetic finish of contact surfaces.

• Walls/Perimeters: 6 to 8 wall loops to ensure that clamping zones, rotation axes, and the chassis mounting point are incredibly strong.

• Infill: 40% to 100% (Gyroid or Cubic). It is imperative to use 100% infill around screw channels and locking mechanisms.

How to Use

1. Print all components (stock body, adjustable comb, rotating buttpad, and adjustment knobs/levers).

2. Insert the mechanical hardware (metric nuts and bolts) into their designated slots.

3. Assemble the various adjustable parts and attach the base of the stock to your chassis tube or interface.

4. Shoulder the firearm, then adjust the length of pull, cheek height, and shoulder rotation according to your morphology.

Firmly lock all tightening points and verify the overall rigidity before use.

About the Project

Part of the Taka Tech Lab series—bridging the gap between DIY maker culture, engineering, and professional sports shooting equipment.