Modular Rifle Stock Bonding Segmentation

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Solution Overview

Problem

Existing rifle stock designs face challenges in production efficiency and cost due to the need for adaptation to different weapon systems, and they often suffer from long-term stability and resistance to deformation issues.

Innovation Solution

A modular rifle stock production method involving the use of multiple stock parts, including a buttstock, forestock, and midstock adapters, all made from a single plastic material, which are connected in a materially bonded and non-detachable manner using complementary connecting segments and a curable adhesive.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single-piece rifle stock is used, then manufacturing simplicity is maintained, but adaptability to different weapon systems deteriorates

Engineering Contradiction:

Improveadaptability to different weapon systemsVSAvoidstock structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The rifle stock is divided into multiple separable components (fore-end, mid-section, butt-stock) that can be independently manufactured and assembled. This segmentation enables adaptation to different weapon systems while maintaining manufacturing simplicity for each individual component.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The modular stock design creates universal components that can serve multiple functions across different weapon systems. The fore-end and butt-stock can be reused with different mid-sections, allowing a single component to adapt to various weapon configurations.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If detachable plug-in screw connections are used, then adaptability to different receivers is improved, but long-term stability and resistance to deformation deteriorate

Engineering Contradiction:

Improveinterchangeability between different receiversVSAvoidlong-term stability and resistance to deformation

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent combines the benefits of modularity with permanent material bonding by integrating the mid-section directly into the fore-end and butt-stock through cohesive material joining. This merging eliminates the instability of detachable connections while preserving the adaptability of modular design.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The stock components are joined using composite material techniques with adhesives and co-curing processes that create permanent, deformation-resistant bonds. This use of composite materials provides both the stability of a single-piece construction and the adaptability of modular components.

Inventive Principle:

Principle #40Composite materials

3Reliability

If multiple stock parts are connected materially bonded, then long-term stability is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvelong-term stabilityVSAvoidmanufacturing process simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The stock components are pre-formed and pre-assembled into modular sections (fore-end, mid-section, butt-stock) that can be independently manufactured and stored. This preliminary action allows for simplified final assembly while maintaining the stability of material-bonded connections.

Inventive Principle:

Principle #10Preliminary action

4Adaptability or versatility

If a modular design with multiple mid-stock adapters is used, then adaptability to different weapon systems is improved, but device complexity increases

Engineering Contradiction:

Improveadaptability to different weapon systemsVSAvoidnumber of stock parts

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The stock is segmented into functional sections with the mid-section serving as an adaptive interface. This segmentation allows for limited, purposeful variations in the mid-section while maintaining standardized fore-end and butt-stock components, reducing overall complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by maintaining standardized, simple designs for the fore-end and butt-stock while allowing the mid-section to have varied local characteristics adapted to different weapon systems. This localized adaptation minimizes overall device complexity.

Inventive Principle:

Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This method allows for the efficient and cost-effective production of a modular rifle stock with high long-term stability, resistance to deformation, and shock resistance, suitable for frequent use without compromising weight or reliability.

Implementation Method 1

connecting segments of complementary shape of two shaft parts to be joined by a material bond are formed, via which connecting segments the respective shaft parts are glued to one another

Methodology Applied

Scientific EffectAdhesive bonding: Adhesive

Data Source

PatentEP3974762B1Modular rifle stock and method of manufacture

Publication Date: 2025.05.28 FBT FINE BALLISTIC TOOLS GMBH

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AI summary

The invention relates to a method for manufacturing a modular rifle stock and to a modular rifle stock itself. The rifle stock comprises several structurally separate and subsequently connected stock parts, including a buttstock (5), a fore-end (2), and at least one intermediate stock adapter (3, 4). All stock parts are made of a plastic material, and at least some of the stock parts to be connected are bonded together in a non-removable manner.