Firearm Muzzle Device Alignment Element for Repeatable Orientation
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Solution Overview
Problem
Current firearm designs, particularly the AR-15 and M16/M4 variants, face issues with the impractical use of single-use crush washers for muzzle device installation, misalignment of gas blocks, and non-repeatability of handguard alignment, leading to compromised performance and maintenance challenges.
Innovation Solution
The introduction of an alignment element with a lock mechanism for secure muzzle device orientation, a gas block nut system for accurate gas block positioning, and a base coupling design for repeatable handguard alignment, eliminating the need for tools and single-use parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a crush washer is used to secure the muzzle device, then the muzzle device can be attached to the barrel, but the crush washer deforms around the threaded barrel causing difficulty in removal and potential cosmetic damage
Solution Approach 1:
The alignment element is segmented into distinct functional zones: a smooth central bore portion for receiving the threaded muzzle portion, a forward bore portion with reduced diameter for engagement, and an external profile with flats for tool engagement. This segmentation allows the single component to perform multiple functions including alignment, securing, and tool engagement without requiring a crush washer.
Solution Approach 2:
The alignment element serves multiple functions simultaneously: it aligns the muzzle device with the barrel, secures the muzzle device through friction engagement in the reduced diameter bore portion, provides tool engagement surfaces for installation and removal, and maintains the muzzle device in a specified orientation. This multi-functionality eliminates the need for separate crush washers and alignment features.
2Strength
If a wrench is used to tighten the muzzle device, then the muzzle device can be securely attached, but the process requires tools and can damage the barrel finish
Solution Approach 1:
The alignment element has non-circular external profile portions with flats at specific locations that provide localized tool engagement surfaces. These flats allow wrench engagement for tightening the muzzle device without requiring the wrench to contact the barrel finish, thus preventing cosmetic damage while maintaining secure attachment.
Solution Approach 2:
The alignment element acts as an intermediary between the muzzle device and the tool (wrench). The tool engages with the alignment element's flats rather than directly with the barrel, transferring the tightening force through the alignment element to the muzzle device while protecting the barrel finish from tool contact.
3Strength
If the muzzle device is tightened past the intended position, then the attachment becomes more secure, but the crush washer becomes unserviceable and must be replaced
Solution Approach 1:
The alignment element's reduced diameter forward bore portion is pre-configured to engage with the threaded muzzle portion at a specific position. This preliminary engagement feature prevents over-tightening by providing a mechanical stop that maintains the muzzle device in the correct orientation and position, ensuring repeatability across multiple installations without requiring replacement.
Solution Approach 2:
The alignment element is designed to be reusable and recoverable. Unlike the single-use crush washer that deforms and must be discarded, the alignment element maintains its structural integrity through multiple use cycles. The smooth central bore and reduced diameter portion are designed to repeatedly engage and disengage from the threaded muzzle portion without degradation, allowing the same alignment element to be used for multiple muzzle device installations.
4Ease of operation
If visual orientation is used during muzzle device installation, then the process is simple, but accurate orientation cannot be ensured
Solution Approach 1:
The alignment element has a non-circular external profile with flats at specific angular positions, creating asymmetric features that provide positive mechanical alignment. When the muzzle device is installed, these asymmetric flats ensure the muzzle device is oriented in a specific direction relative to the barrel, eliminating the need for visual estimation and ensuring accurate orientation every time.
Solution Approach 2:
The patent replaces the visual/orientation-based mechanical alignment system with a positive mechanical indexing system. The alignment element's asymmetric profile and the reduced diameter bore portion create a mechanical constraint that automatically orients the muzzle device correctly through physical geometry rather than visual estimation, ensuring precision while maintaining simplicity.
5Ease of repair
If the crush washer is cut from the barrel upon removal, then the used washer can be removed, but cosmetic damage to the barrel finish results
Solution Approach 1:
The alignment element is designed to be completely extractable from the barrel without leaving any deformed portions behind. The smooth central bore allows the alignment element to be removed freely from the threaded muzzle portion, and the alignment element itself can be completely removed without requiring cutting or leaving remnants on the barrel, thus avoiding cosmetic damage while enabling complete removal.
Data Source
AI summary
Firearms have an alignment element configured to connect to the barrel with the threaded muzzle portion exposed forward of the alignment element, the alignment element having a lock element movable between a release position and an engaged position, a muzzle device having internal threads configured to mate with the threaded portion of the barrel, the muzzle device defining a lock channel adapted to receive the lock element in the engaged position, the lock channel including wall portions configured to contact the lock element in the engaged position to prevent rotation of the muzzle device, and the lock element in the release position being clear of the lock channel to enable the muzzle device to rotate for removal from the threaded muzzle portion. The alignment element may define a first bore portion configured to closely receive a selected barrel portion immediately aft of the shoulder surface.