Shell Casing Catcher With Shim-Fit Mounting for Fast Attachment

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Solution Overview

Problem

Conventional firearm brass catchers are bulky, difficult to use, and require extensive mounting hardware, posing hazards and environmental concerns with spent brass ejection.

Innovation Solution

A firearm shell casing catching system that can be attached and detached with one hand, securely fits to a firearm without screws or fasteners, and includes a detachable hopper that can hold spent casings, featuring a mounting assembly with adjustable shims for various firearm magwell dimensions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional brass catchers are used to collect spent casings, then spent brass collection is achieved, but the device becomes bulky and requires extensive mounting hardware

Engineering Contradiction:

Improvespent brass collectionVSAvoidmounting hardware

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The brass catcher is divided into a main body and a separate mounting assembly that attaches to the firearm's rail system. This segmentation allows the catching function to be isolated from the mounting mechanism, reducing overall device complexity while maintaining reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mounting assembly is designed to interface with standard firearm rail systems, making the brass catcher universally compatible across different firearm platforms. This multi-functionality eliminates the need for custom mounting hardware for each firearm type, reducing device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If conventional brass catchers are used to collect spent casings, then spent brass collection is achieved, but the device becomes bulky and difficult to use

Engineering Contradiction:

Improvespent brass collectionVSAvoidattachment mechanism

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The mounting assembly uses a simple clamp-like mechanism that utilizes the firearm's existing rail structure for support, replacing complex screw-based or bracket-based mounting systems. This substitution reduces the number of components and simplifies the attachment process.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS20260002747A1Configurable firearm shell casing catching system

Publication Date: 2026.01.01 MAGWELL MOUNTS LLC

AI summary

A firearm shell casing catching system for collecting casings ejected from a firearm includes a mounting assembly, casing deflector, and a hopper. A shim can be optionally attached to the mounting assembly thereby decreasing the inside dimension of the mounting assembly to allow for the firearm shell casing catching system to be attached to magwells of firearms having different sizes.