Muzzle Extender for Continuous Indexing and Alignment

Solution Overview

Problem

Current methods for attaching accessories to firearms, such as the AR-15, limit indexing options, causing misalignment and accuracy issues due to relative movement between accessories and the firearm bore, especially when using handguards or muzzle devices, which restricts the ability to attach devices at various angles and requires cumbersome adjustments.

Innovation Solution

A muzzle extender system with a uniform mounting surface allows for continuous indexing of accessories around the firearm bore by clamping them directly to a rigid extender attached to the barrel, enabling secure attachment at any angle without removing components, ensuring alignment and stability under load.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If accessories are attached to the threaded barrel using female threading, then attachment is simple, but indexing is limited or nonexistent

Engineering Contradiction:
Core Design Contradiction:
Ease of operationVSAdaptability or versatility

Solution Approach 1:

The system divides the attachment mechanism into separate functional components: a muzzle extender that provides the mounting surface, a device that attaches to the extender, and a separate indexing mechanism. This segmentation allows the mounting surface to be independently optimized for versatility while maintaining simple attachment procedures.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The muzzle extender acts as an intermediary component between the threaded barrel and the accessory device. It provides a standardized mounting surface that enables continuous indexing while maintaining simple attachment through threaded connection, resolving the contradiction between ease of attachment and indexing versatility.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the front sight is attached to the handguard, then customization options increase, but misalignment occurs under load

Engineering Contradiction:
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The system extracts the sight attachment from the handguard and relocates it to the muzzle extender, which is rigidly connected to the barrel. This extraction eliminates the relative movement between handguard and bore, ensuring alignment stability while maintaining customization capabilities through the standardized mounting interface.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The muzzle extender is nested onto the barrel, providing a stable mounting platform for the sight. This nested structure ensures that the sight is positioned relative to the barrel rather than the handguard, eliminating misalignment under load while preserving customization options.

Inventive Principle:
Principle #7Nested doll (Nesting)

3Reliability

If accessories are attached at fixed angles using crush washers, then attachment is secure, but re-indexing is cumbersome

Engineering Contradiction:
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The system transitions from static, fixed-angle attachment using crush washers to a dynamic indexing mechanism that allows continuous adjustment. The device can be rotated to any angle and secured, enabling rapid re-indexing while maintaining secure attachment through the same clamping mechanism.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The indexing mechanism allows continuous change of the angular parameter, enabling the device to be positioned at any angle around the bore. This eliminates the need to remove and replace components for re-indexing, reducing time loss while maintaining secure attachment.

Inventive Principle:
Principle #35Parameter changes

4Adaptability or versatility

If the muzzle device is rotated to a different angle, then indexing is achieved, but components must be removed and reinstalled

Engineering Contradiction:
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system incorporates preliminary indexing features in the form of reference marks or indicators that show the current angle position. This allows the user to quickly determine the desired angle without complex measurement procedures, simplifying the indexing process while maintaining versatility.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS9964376B2Bore extender for accurate sighting and continuous indexing
Publication Date: 2018.05.08
  • US9964376B2 patent drawing
  • US9964376B2 patent drawing
  • US9964376B2 patent drawing

AI summary

The current system is a method for easily attaching firearm devices to the end of a firearm. The system is used to improve the relative alignment between firearm devices and the bore of the firearm. The system solves the problem of non-uniformity when attaching devices to a firearm, by providing a uniform mounting surface. The system includes three main parts: a muzzle extender, a device, and a clamping method. The extender includes a threaded female receptor for attaching to the firearm muzzle and a clamping surface to be used with a clamping method to attach the device. The system has multiple embodiments including, built in muzzle devices, different clamping methods, and multiple devices to attach to the system.