Multi-Port Gas Barrel Selector for Ammunition Timing
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Solution Overview
Problem
Designing a gas-operated semi-automatic firearm system that reliably operates with both supersonic and subsonic ammunition of the .300 Blackout caliber has been challenging due to significant differences in muzzle velocities and chamber pressures, as existing systems often fail to provide reliable operation with either type of ammunition when trying to accommodate both.
Innovation Solution
The system includes longitudinally spaced apart gas ports in the barrel, with a selector tube that can be axially rotated to select between different gas port locations, adjusting the timing of gas flow to the bolt carrier assembly, ensuring reliable operation with both supersonic and subsonic ammunition by matching the gas flow to the specific load characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If gas flow is adjusted by selecting multiple barrel ports at the same longitudinal position, then the total cross-sectional area of gas passageway is changed, but the timing of gas flow to the bolt carrier assembly remains unchanged, resulting in unreliable operation with both supersonic and subsonic ammunition
Solution Approach 1:
The patent transitions from adjusting gas flow by changing cross-sectional area (2D adjustment) to adjusting gas flow timing by changing longitudinal position (1D adjustment along the barrel axis). By spacing gas ports at different longitudinal positions, the system controls when gas reaches the bolt carrier assembly during the projectile's travel, enabling reliable operation with both supersonic and subsonic ammunition.
2Device complexity
If a single gas port location is used, then the gas system structure is simple, but it cannot accommodate both supersonic and subsonic ammunition with vastly different velocities and pressures
Solution Approach 1:
The patent makes the gas system dynamic by providing multiple gas ports at different longitudinal positions along the barrel, allowing the system to adapt its gas flow timing to match different ammunition types. A selector mechanism enables dynamic switching between ports, transforming a static single-port system into a dynamic multi-port system that can accommodate both supersonic and subsonic ammunition.
Solution Approach 2:
The multi-port gas system achieves universality by being capable of operating reliably with different ammunition types (supersonic and subsonic) using the same firearm platform. By selecting appropriate gas ports based on ammunition characteristics, the system universally supports various loads while maintaining consistent operational reliability.
3Reliability
If gas flow timing is not adjusted for different ammunition velocities, then the operating system cannot reliably cycle with both supersonic and subsonic loads, but adding timing adjustment increases system complexity
Solution Approach 1:
The patent segments the gas delivery system into multiple discrete gas ports positioned at different longitudinal locations along the barrel. Each segment (port) is optimized for specific ammunition types, allowing the system to deliver gas at the appropriate timing for reliable cycling with both supersonic and subsonic loads while keeping each individual port relatively simple in structure.
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
This solution allows for reliable semi-automatic operation with both supersonic and subsonic ammunition by adjusting the timing of gas flow, ensuring consistent performance across varying projectile velocities and pressures, enhancing the system's reliability and functionality.
Implementation Method 1
The selector tube is selectively displaceable between at least a first position and a second position. Each position provides gas flow from only one of the gas port locations such that the timing of operating gas flow to the operating system is changed by selection between first and second positions.
Data Source
AI summary
Provided is a gas operated firearm timing selection system having a barrel, first and second gas blocks, a gas delivery tube, and a selector tube. The barrel has at least first and second longitudinally spaced apart gas port locations. First and second gas blocks each correspond to one of the gas port locations. The gas delivery tube operably extends between the first gas block and an operating system of the firearm. The selector tube operably extends between the gas blocks to convey operating gas from either of the gas port locations and is selectively displaceable between at least a first position and a second position. Each position provides gas flow from only one of the gas port locations such that the timing of operating gas flow to the operating system is changed by selection between first and second positions.