Modular Firearm FCU Conversion Using Grip Module and Extended Firing Slide

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Solution Overview

Problem

Conventional firearms have components that are not interchangeable, limiting customization and versatility.

Innovation Solution

A firearm assembly kit and a firing control unit (FCU) that can be disassembled from a handgun, allowing conversion into different firearm types such as semiautomatic rifles, bullpup firearms, and machine guns, using a grip module and extended firing slide to facilitate firing mechanisms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional firearms use fixed, non-interchangeable components, then manufacturing and design are simplified, but customization and versatility are limited

Engineering Contradiction:

Improvefirearm configuration versatilityVSAvoidcomponent interchangeability system

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The firearm is divided into modular components including a grip module, upper receiver, lower receiver, and barrel assembly that can be independently configured and interchanged. The grip module specifically contains a firing control unit that can be disassembled and reconfigured with different components to create various firearm types.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A universal firing control unit design allows the same core mechanism to function across multiple firearm configurations. The FCU can be adapted to work with different upper receivers, barrels, and grip modules, enabling a single base component to serve multiple firearm types including handguns, rifles, and machine guns.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If firearm components are made interchangeable and modular, then customization and versatility are enhanced, but device complexity increases

Engineering Contradiction:

Improvefirearm configuration versatilityVSAvoidmodular component system

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The firearm system is segmented into standardized modules with defined interfaces. The grip module separates the firing control unit from the main receiver, allowing independent replacement and configuration of each module while maintaining overall system functionality through standardized connection points.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The firing control unit is nested within the grip module assembly, which itself interfaces with the upper and lower receivers. This nested structure allows the FCU to be accessed and replaced through the grip module without disassembling the entire firearm, managing complexity through hierarchical organization.

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS20250377178A1Method and apparatus for providing a module for firearm modification via an existing firing control unit

Publication Date: 2025.12.11 BLACK SITE INC

AI summary

A firearm assembly, capable of firing bullets, includes a firearm assembly kit and a firing control unit (“FCU”). The FCU, in one embodiment, is disassembled from a handgun which is operable by one hand and capable of initiating firing a bullet when a trigger of the FCU is pulled. The firearm assembly kit is configured to house the FCU to form an operable firearm resembling a semiautomatic rifle operable by two hands. The kit includes a grip module and an extended firing slide (“EFS”). The grip module includes a handgrip, an FCU housing, a trigger guard, and a magazine port, wherein the trigger guard is situated between the handgrip and the magazine port which is located in front of the handgrip away from the user. The EFS facilitates firing of bullets from a magazine inserted in the magazine port via an extended firing pin.