Unitary Receiver Design for Automatic Rifle Precision

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Solution Overview

Problem

Automatic rifles, particularly those based on AR-10 and AR-15 platforms, often experience play between the upper and lower receivers, leading to reduced handling consistency, shooting precision, and accuracy, as well as noise issues when handled.

Innovation Solution

A unitary receiver design that houses the bolt assembly and trigger mechanism, with the buttstock, barrel, and grip assemblies connected to this single body, eliminating play between the upper and lower receivers and enhancing stiffness to improve precision and accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a unitary receiver design is used, then shooting precision and accuracy are improved, but device complexity increases

Engineering Contradiction:

Improveshooting precisionVSAvoidreceiver structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent merges the upper and lower receivers into a single unitary receiver body, eliminating the interface between separate parts. This consolidation removes play and improves structural stiffness, directly enhancing shooting precision and accuracy while maintaining manageable complexity through functional integration.

Inventive Principle:

Principle #5Merging (Combining)

2Manufacturing precision

If a unitary receiver design is used, then shooting accuracy is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveshooting accuracyVSAvoidreceiver manufacturing

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The upper and lower receivers are merged into a single unitary structure that can be manufactured as one piece or pre-assembled unit. This eliminates alignment issues between separate parts and simplifies quality control, improving shooting accuracy while managing manufacturing complexity through integrated production.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of operation

If separate upper and lower receivers are used, then ease of assembly is improved, but handling consistency deteriorates

Engineering Contradiction:

Improveassembly easeVSAvoidhandling consistency

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The separate upper and lower receivers are merged into a unitary structure that eliminates play and movement between parts. This improves handling consistency and shooting stability while maintaining ease of assembly through modular component attachment to the unified receiver body.

Inventive Principle:

Principle #5Merging (Combining)

4Ease of repair

If separate upper and lower receivers are used, then ease of repair is improved, but noise generation increases

Engineering Contradiction:

Improvecomponent accessibilityVSAvoidrattling noise

Core Design Contradiction:

Ease of repairVSObject-generated harmful factors

Solution Approach 1:

The unitary receiver design eliminates the interface between separate receivers that causes rattling noise during handling. Components can still be accessed and replaced by detaching from the unified receiver body, maintaining ease of repair while significantly reducing noise generation through the elimination of play between parts.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12092417B2Automatic rifle and receiver for same

Publication Date: 2024.09.17 SPUHR I DALBY

AI summary

An automatic rifle (10) includes a receiver (12), a bolt assembly (110), a trigger mechanism (106), a buttstock assembly (100), a barrel assembly (104), and a grip assembly (102). The receiver (12) is characterized by being a unitary body that houses the bolt assembly (110) and the trigger mechanism (106), and the receiver (12) is configured for the connection thereto of the buttstock assembly (100), the barrel assembly (104), and the grip assembly (102).