Training Magazine Safety Block for Firearm Bolt Lock

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Solution Overview

Problem

Conventional training magazines for semi-automatic weapons lack the full shape and weight of real magazines, leading to unrealistic training postures and safety concerns when used with chamber flags, and commercially available dummy magazines are not designed for real weapons.

Innovation Solution

A training magazine with a safety block at the top that locks the bolt to the rear, combined with a chamber flag, providing a 360° visual confirmation of a safe weapon, and is designed to mimic the size and weight of a loaded authentic magazine.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional dummy magazines are used for training, then the weapon can be handled during training, but they lack the full shape and weight of real magazines causing unrealistic training postures

Engineering Contradiction:

Improvetraining realismVSAvoidmagazine shape and weight

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The training magazine is designed as a functional copy of a real magazine, replicating its external shape, dimensions, and weight characteristics. The magazine body, follower, and spring assembly are configured to match the profile and heft of an authentic loaded magazine, enabling realistic training postures and handling without using actual ammunition

Inventive Principle:

Principle #26Copying

2Reliability

If chamber flags are used with emptied magazines for safety indication, then visual confirmation of empty chamber is provided, but it increases the likelihood of introducing live ammunition and cannot be used with training magazines

Engineering Contradiction:

Improvesafety indicationVSAvoidrisk of live ammunition introduction

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The safety block integrates multiple safety functions into a single component: it blocks the breach to prevent firing, provides a visual indicator of the training magazine's presence, and works in conjunction with the chamber flag system. This merged design eliminates the need to choose between safety indication and training realism, allowing both chamber flags and training magazines to be used together safely

Inventive Principle:

Principle #5Merging (Combining)

3Ease of operation

If training magazines without safety blocks are used, then the weapon can be handled, but the weapon remains capable of firing creating safety hazards

Engineering Contradiction:

Improvetraining capabilityVSAvoidunintentional firing risk

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The safety block is designed to proactively prevent any possibility of firing by physically blocking the breach area where the cartridge would be positioned. This preliminary protective action is built into the magazine design itself, ensuring that even if the chamber flag is overlooked or misinterpreted, the training magazine cannot accidentally discharge the weapon

Inventive Principle:

Principle #9Preliminary anti-action

Data Source

PatentUS10563947B2Training magazine and safety system for firearms

Publication Date: 2020.02.18 SAWICKI MICHAEL

AI summary

A training magazine and safety system for a magazine-fed firearm are provided. The training magazine includes a safety block at a top of the magazine, configured to block the breach of the firearm and thus keep the bolt of the firearm locked to the rear such that the firearm is incapable of firing. The safety block can include a notch in a front portion thereof, which is configured to accommodate a chamber flag while the chamber flag is in the chamber of a firearm. As such, the chamber flag and training magazine can be used together as a safety system. Methods of training are also provided.