Configurable Blowback Bolt for Caliber Conversion
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Solution Overview
Problem
Existing firearm blowback bolt systems are not modularly designed to accommodate both pistol and rifle cartridges of different calibers, requiring a full bolt assembly change for caliber conversion and lacking flexibility in cartridge ejection direction and recoil management.
Innovation Solution
A configurable blowback bolt system featuring a two-part bolt assembly with interchangeable bolts and buffers, allowing for easy caliber changes and adjustable ejection directions, along with a modular design that supports both short-stroke and long-stroke operations, and ejection to either side of the firearm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a full bolt assembly change is performed to convert between rifle and pistol calibers, then the firearm can accommodate different cartridge calibers, but the device complexity and time required for conversion increase
Solution Approach 1:
The bolt assembly is divided into two separable components: a reusable bolt carrier and interchangeable bolts specific to different calibers. This segmentation allows users to keep the bolt carrier and only swap the bolt portion when changing calibers, significantly reducing conversion complexity and time while maintaining full caliber versatility
Solution Approach 2:
The bolt carrier is designed as a universal component that can accommodate multiple types of bolts (rifle and pistol calibers) through a standardized interface. This multi-functionality eliminates the need for complete assembly changes and reduces the overall number of parts needed in the system
2Adaptability or versatility
If the entire bolt assembly is changed for caliber conversion, then the firearm can fire different calibers, but the manufacturing complexity and cost increase
Solution Approach 1:
Manufacturing is simplified by producing a single universal bolt carrier in high volume, and separate caliber-specific bolts in lower volumes. This segmentation allows the complex carrier to be manufactured once and reused, while simpler bolts can be produced more economically for different calibers, reducing overall manufacturing complexity and cost
Solution Approach 2:
The universal bolt carrier design serves multiple calibers, reducing the total number of unique parts that need to be manufactured. This multi-functionality decreases inventory requirements, simplifies supply chain management, and reduces manufacturing complexity compared to producing complete separate assemblies for each caliber
3Adaptability or versatility
If a fixed ejection side is designed into the bolt assembly, then the structure is simpler, but the adaptability for different ejection configurations is reduced
Solution Approach 1:
The ejection configuration is made dynamic and interchangeable rather than fixed. Users can swap extractor and ejector components between left and right sides depending on the desired ejection direction, allowing the system to adapt to different ejection configurations without permanently modifying the bolt structure
Solution Approach 2:
The bolt carrier and bolt components are designed with symmetric or interchangeable features that allow them to function with either left-sided or right-sided extraction and ejection. This multi-functionality enables a single bolt carrier to support multiple ejection configurations without increasing structural complexity
Data Source
AI summary
A configurable blowback bolt system is provided. Embodiments include a two-part configurable bolt assembly having a bolt carrier and a configurable bolt that allows for use with various calibers of ammunition, both rifle and pistol. The configurable bolt may also eject cartridges to the right or left side of the rifle by moving the extractor to one or the other side of the bolt. A buffer may be included as part of the configurable blowback bolt to shorten the stroke based on the caliber of ammunition being fired with the configurable blowback bolt system.