Lightweight semi-free bolt based on a ring-shaped nozzle
By opening a gas port on the side wall of the barrel and forming a venturi tube with a cylinder and a fluid resistance generator, the problem that traditional bolts cannot be adapted to high-powered ammunition is solved, achieving the effects of weight reduction, reduced recoil thrust and improved shooting accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 王文轩
- Filing Date
- 2026-06-10
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional blowback mechanisms cannot be adapted to high-powered ammunition, resulting in bulky weapons with violent recoil. Existing semi-blowback mechanisms are complex in structure, costly, and unreliable, making it difficult to achieve lightweight and efficient firing.
Employing the principle of fluid resistance delayed locking, a venturi tube is formed by opening a gas guide hole on the side wall of the barrel and using a cylinder in conjunction with a fluid resistance generator. The congestion effect generated by the high-pressure gas is used to counteract the chamber pressure thrust, thereby achieving lightweight and delayed locking.
It achieves a lightweight bolt assembly (weight controlled between 150 and 250g), reduces recoil thrust, improves shooting accuracy and reliability, reduces manufacturing costs and maintenance difficulty, and adapts to different chamber pressure environments.
Smart Images
Figure FT_1