The Keystone Sporting Arms thread adapter provides a simple means to convert a 3/8×24 threaded muzzle to accept 1/2×28-threaded accessories. It is listed with a blued finish and noted as fitting Mini Mosin / Mini 1903 rifles. This accessory part is intended for users who need to adapt older or nonstandard thread pitches for modern attachments.
Key Specifications
- The thread conversion is 3/8×24 to 1/2×28.
- Compatibility is listed as Fits Mini Mosin/Mini 1903.
- The finish is specified as Blued.
- The product type is Accessory-Parts.
- Can be disassembled: False.
- Drilled and tapped: False.
- The listed weight is 0.05 (unit not specified in source data).
- The listed shipping weight is 0.05 (unit not specified in source data).
- Package dimensions are listed as 7.6 by 3.0 by 1.1 (length x width x height; units not specified).
This compact thread adapter is a practical solution for owners of legacy rifles or custom projects that require a different muzzle thread. Its understated blued finish preserves a subdued appearance while enabling compatibility with common 1/2×28 accessories; confirm thread size compatibility with your barrel prior to installation.





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