Gas block barrel slot for direct gas operated firearms
The introduction of a relief slot in the barrel with specific slot configurations mitigates barrel deformation caused by the coil pin, enhancing accuracy and longevity in direct gas operated firearms.
US20260177340A1Pending Publication Date: 2026-06-25SUREFIRE LLC
Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Applications(United States)
- Current Assignee / Owner
- SUREFIRE LLC
- Filing Date
- 2025-12-23
- Publication Date
- 2026-06-25
Smart Images
Figure US20260177340A1-D00000_ABST
Abstract
An apparatus and methods are provided for a relief slot disposed in a barrel to receive a gas block of a direct gas operated firearm. The relief slot comprises a first slot portion on each end of a second slot portion. The first slot portions receive a coil pin to locate and bias the gas block onto the barrel. The second slot portion relieves pressure on a bore inside the barrel by the coil pin. The second slot portion can be milled perpendicularly between the first slot portions or can be cut in a single toolpath that is blended with the first slot portions. The second slot portion generally has a larger size than the first slot portions to form a space between the second slot portion and the coil pin, thereby preventing the coil pin from causing a deformation within the bore.
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