Compact AR Buttstock Assembly With Integrated Buffer Bolt Carrier
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Solution Overview
Problem
Existing firearms, particularly those in the AR15/M16 family, face challenges in achieving a compact size while firing rifle ammunition, as they often suffer from increased length due to the buffer tube and bolt carrier, leading to issues like bolt bounce and reduced dwell time, which affects operational reliability and terminal performance.
Innovation Solution
A compact buffer assembly is introduced, integrating a buffer onto the bolt carrier and reducing its length, along with a modified spring and buffer tube configuration, to facilitate proper reciprocating movement and prevent bolt bounce, allowing for a more compact firearm design without altering the receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the buffer tube and bolt carrier length are reduced to achieve compact size, then the overall length of the firearm is reduced, but bolt bounce occurs and dwell time is reduced, affecting operational reliability
Solution Approach 1:
The buffer is integrated directly onto the bolt carrier, merging two previously separate components (buffer and bolt carrier) into a single unit. This integration eliminates the need for a separate buffer tube while maintaining the buffer's function to reduce bolt bounce, thereby reducing overall firearm length without compromising operational reliability
Solution Approach 2:
The spring configuration is modified to provide dynamic compression and expansion that optimizes bolt carrier movement. The spring is positioned and dimensioned to compress during bolt carrier rearward movement and expand to return the bolt carrier forward, creating controlled dynamic motion that maintains dwell time and prevents bolt bounce even in a compact configuration
2Length of moving object
If the buffer tube length is reduced to achieve compact size, then the firearm becomes more portable, but the bolt carrier cannot complete proper reciprocating movement
Solution Approach 1:
By merging the buffer with the bolt carrier into a single integrated component, the design eliminates the traditional buffer tube entirely. The integrated buffer-bolt carrier assembly completes its reciprocating movement within the receiver without requiring an extended buffer tube, enabling compact firearm design while maintaining proper bolt carrier operation
Solution Approach 2:
The buffer is repositioned and reconfigured within the bolt carrier assembly, changing its spatial arrangement from a separate component in a long buffer tube to an integrated part of the bolt carrier itself. This dimensional reorganization allows the system to function properly in a compact configuration
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces the overall length of the firearm by at least 3.2 inches, enhances operational reliability, and maintains terminal and external ballistic performance, making it suitable for conventional rifle ammunition without requiring receiver modifications.
Implementation Method 1
a spring and buffer tube configured to receive a portion of the bolt carrier group
Implementation Method 2
integrating a buffer onto the bolt carrier... to prevent bolt bounce
Data Source
AI summary
A buttstock assembly configured to work in conjunction with a compact buffer assembly consisting of a buffer tube, spring and bolt carrier with an integral buffer is provided. The buttstock assembly, buffer tube and bolt carrier are configured to work with AR 15/M16 type firearms and their derivatives. By incorporating the buffer onto the bolt carrier, which is used in conjunction with a buffer tube of reduced length, the overall length of the host firearm is reduced by approximately 3. 2 inches. No permanent modification need be made to the host firearm in order to utilize the compact buffer assembly and buttstock assembly disclosed herein.