Modular Gunstock with Sliding Sleeve and Dual-Pawl Latch

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing modular gunstocks face issues with bulkiness, structural failure leading to high replacement costs, instability, insufficient strength, and cheek weld disruption due to complex mounting systems.

Innovation Solution

A two-piece modular gunstock design featuring a receiver extension tube with a sliding sleeve and rail system for mounting, an adjustable length stock with a quick extension preset system, dual independent pawl latch, shock cushion, storage compartment, and customizable cheek piece, providing a lower profile and cost-effective replacement options.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a modular mounting system is added to the gunstock, then customization capability is improved, but device complexity and bulkiness increase

Engineering Contradiction:

Improvecustomization capabilityVSAvoidmounting system complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The gunstock is divided into separate modular components including a receiver extension tube, a sleeve with mounting features, and a rail system. This segmentation allows independent replacement and customization of each component without affecting the entire stock, reducing overall system complexity while maintaining adaptability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The sleeve component serves multiple functions: it provides structural connection between the receiver extension and rail, incorporates mounting features for accessories, and allows for length adjustment. This multi-functionality reduces the need for separate dedicated components, simplifying the overall mounting system.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If additional mounting features are incorporated into the gunstock, then adaptability is improved, but manufacturing cost increases

Engineering Contradiction:

Improvemounting adaptabilityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

Mounting features are concentrated in the sleeve component rather than being distributed throughout the entire gunstock. This allows standardized manufacturing of the sleeve with integrated mounting capabilities, while other components remain simpler and less expensive to produce.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The sleeve is designed to slide over the receiver extension tube and provide mounting features on its external surface. This nested arrangement allows the mounting system to be added as a separate layer without requiring complex integration into the base receiver extension, simplifying manufacturing.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Strength

If a single-piece mounting platform is used, then structural strength is improved, but replacement cost increases upon failure

Engineering Contradiction:

Improvemounting platform strengthVSAvoidreplacement cost

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The mounting platform is divided into the receiver extension tube and sleeve as separate but connected components. The sleeve can be independently replaced if damaged, while the receiver extension tube remains intact. This segmentation maintains structural strength through the connection between parts while significantly reducing replacement costs compared to a single-piece design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The modular design allows the receiver extension tube to be recovered and reused when the sleeve fails. Only the damaged sleeve component needs to be replaced, while the functional receiver extension is retained and can be used with a new sleeve, reducing overall replacement costs.

Inventive Principle:

Principle #34Discarding and recovering

4Ease of manufacture

If a modular two-piece mounting platform is used, then replacement cost is reduced, but stability at the joint may deteriorate

Engineering Contradiction:

Improvereplacement costVSAvoidjoint stability

Core Design Contradiction:

Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The sleeve is designed to merge the receiver extension tube and rail into a unified structural assembly. The sleeve provides continuous external support and mounting features that bridge the connection between the two pieces, enhancing joint stability while maintaining the modular advantage of independent replacement.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The mounting system utilizes composite construction with the sleeve providing structural reinforcement over the receiver extension tube. This layered composite approach distributes stresses across multiple materials and interfaces, improving joint stability despite the two-piece configuration.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS20100205846A1Modular gunstock

Publication Date: 2010.08.19 MAGPUL INDUSTRIES

AI summary

The present invention is a modular gunstock utilizing a two-piece mounting structure and a stock module. The structure comprises a weapon attachment, in the case of an AR15/M16 rifle a receiver extension tube, and a sleeve slidable over said attachment and containing mounting structure for the stock module. The disclosed stock module is adjustable for length and features a length pre-set system, a latch with independent dual-pawls and an integrated impact buffer, modular tailpiece, and storage. The sleeve also features a position selectable fixed cheek plate.