Synthetic Firearm Receiver with Hinged Rear Closure

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Solution Overview

Problem

Current firearms, particularly automatic rifles, require complex disassembly processes and heavy materials like steel and aluminum, which hinder weight reduction and increase costs, while safety concerns remain due to the lack of reinforcing connections in the rear receiver closure.

Innovation Solution

A firearm design featuring a single-piece synthetic receiver with a simplified disassembly mechanism, utilizing a foldable stock and a lower receiver made of synthetic material, where the rear closure is achieved through a hinged plate and spring-loaded system, allowing for easy opening and inspection without loose components or tools.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional metal receivers with complex disassembly mechanisms are used, then safety and structural strength are improved, but weight and device complexity increase

Engineering Contradiction:
ImprovesafetyVSAvoidfirearm weight
Core Design Contradiction:
ReliabilityVSWeight of moving object

Solution Approach 1:

The receiver is made from a synthetic material that combines lightweight properties with sufficient mechanical strength to contain firing gases and support the bolt assembly, replacing traditional heavy metal materials while maintaining safety requirements

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The receiver is divided into a main body and a separately removable rear closure element that can be quickly detached without tools, allowing rapid access for cleaning and maintenance while the main receiver structure remains intact and lightweight

Inventive Principle:
Principle #1Segmentation

2Reliability

If traditional metal receivers with reinforcing connections are used, then safety and structural strength are improved, but device complexity and manufacturing costs increase

Engineering Contradiction:
ImprovesafetyVSAvoidreceiver structure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The synthetic material provides inherent strength-to-weight ratio that eliminates the need for complex reinforcing connections and internal bracing required in lightweight metal constructions, simplifying the overall receiver structure

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The rear closure is separated as an independent removable element from the main receiver body, allowing the main receiver to have a simpler structure while the closure element provides the necessary sealing and structural completion

Inventive Principle:
Principle #1Segmentation

3Stability of the object's composition

If traditional complex disassembly mechanisms are used, then structural integrity is maintained, but ease of operation and maintenance speed decrease

Engineering Contradiction:
Improvestructural integrityVSAvoiddisassembly ease
Core Design Contradiction:
Stability of the object's compositionVSEase of operation

Solution Approach 1:

The rear closure is designed as a separately removable module that can be quickly detached from the main receiver without tools or complex mechanisms, enabling rapid access for cleaning while the main receiver structure remains intact

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The rear closure element is extracted as a distinct removable component from the receiver assembly, allowing it to be easily removed and reattached while maintaining the structural integrity of the main receiver body

Inventive Principle:
Principle #2Taking out (Extraction)

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

The design achieves a lightweight, safe, and cost-effective firearm with enhanced safety margins, enabling efficient disassembly and maintenance while maintaining structural integrity and reducing weight, suitable for integration with modern firing control systems.

Implementation Method 1

a rear closing element which is shock resistant and safe, suitable for a receiver made of synthetic material, in which a lower receiver made of synthetic material is inserted

Methodology Applied
Scientific EffectSpring mechanism: Spring

Data Source

PatentEP2045560B1Firearm with detachable trigger group module
Publication Date: 2013.12.04 FABBRICA DARMI PIETRO BERETTA SPA
  • EP2045560B1 patent drawingFigure 1
  • EP2045560B1 patent drawingFigure 2A
  • EP2045560B1 patent drawingFigure 2B

AI summary

A firearm, in particular an automatic or semi-automatic rifle, with a simplified disassembly, comprising a receiver (12), a barrel (13), a bolt assembly (14), a foldable stock (16) and a removable lower receiver (17) comprising a magazine (19) and a release mechanism (20), is equipped with a lower receiver (17) inserted with shape coupling in the lower open part of said receiver (12) between a front seat (21) and a rear seat (22) of the receiver (12), wherein the front seat (21), coupled with at least one complementary surface (23) of the lower receiver (17), forms a front articulation (24) for the rotation of the lower receiver (17) with respect to the receiver (12), also comprising blocking means of the lower receiver (17) in at least two different positions.