Muzzle Attachment Locking Mechanism for Stable Barrel Alignment

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Solution Overview

Problem

Existing handgun compensators face issues with thread wear and thermal cycling, leading to misalignment and potential detachment from the barrel due to improper timing and loosening.

Innovation Solution

A muzzle attachment with a locking mechanism that includes a fastener and adapter interface, such as a yoke, which engages a circumferential groove on the barrel or adapter to secure the attachment axially and rotationally, preventing misalignment and detachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a threaded compensator is installed on the barrel, then the compensator can be attached to reduce muzzle rise, but the threads wear over time causing misalignment and potential detachment

Engineering Contradiction:

Improveattachment reliabilityVSAvoidthread durability

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent extracts the threading function from the compensator-barrel interface and replaces it with a separate locking mechanism. The locking mechanism includes a locking member that engages with a locking feature on the barrel, eliminating thread wear while maintaining secure attachment. This separates the attachment function from the threading function, allowing the threads to be used only for initial positioning without bearing the full attachment load.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The attachment system is segmented into distinct functional components: the threaded interface for initial positioning and alignment, and a separate locking mechanism for secure attachment. This segmentation allows each component to perform its specific function optimally without the degradation issues of thread wear affecting the overall attachment reliability.

Inventive Principle:

Principle #1Segmentation

2Manufacturing precision

If a threaded compensator is tightened to ensure proper timing, then alignment is achieved, but thermal cycling causes loosening and misalignment

Engineering Contradiction:

Improvecompensator timing alignmentVSAvoidalignment stability

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The locking mechanism is engaged after initial threading to pre-compensate for thermal expansion and contraction forces that would otherwise cause loosening. The locking member applies continuous counter-pressure to maintain the compensator's position against thermal cycling forces, preventing the loosening that would lead to misalignment.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The threading operation performs the preliminary action of positioning and aligning the compensator with proper timing, while the subsequent locking mechanism secures this position. This two-stage process ensures that the precise alignment achieved during installation is maintained throughout operation despite thermal variations.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20260022907A1Muzzle attachment with locking mechanism

Publication Date: 2026.01.22 SIG SAUER INC

AI summary

A muzzle attachment for a firearm includes an attachment body defining a projectile passage therethrough along a longitudinal axis, the projectile passage having a proximal end portion sized to receive a distal end portion of a barrel of the firearm or an adapter attached to the barrel. A locking assembly is provided in the attachment body and is operable to tighten the body to the barrel or muzzle adapter by engaging the barrel or muzzle adapter. In one example, the locking assembly includes a fastener that when advanced moves a yoke into engagement with a circumferential groove on the barrel or muzzle adapter. The attachment can be, for example, a compensator, flash hider, or muzzle brake.