This Keystone Sporting Arms Thread Adapter converts a 3/8×24 threaded rimfire barrel over to the widely used 1/2×28 thread pattern, brand part number KSA61-2M38. Keystone, maker of the popular Crickett youth rimfire rifle line, ships many of its barrels with the less common 3/8×24 thread, which limits which muzzle devices will bolt straight on. This adapter closes that gap, letting owners run the same 1/2×28 thread protectors, flash hiders, and muzzle devices used across most of the rimfire and centerfire aftermarket. It threads directly onto the barrel with no gunsmithing required, making it a simple, affordable way to expand what a Crickett-pattern rifle can run up front.

Key Specifications

• Adapter converts a 3/8×24 threaded barrel to the more common 1/2×28 thread pattern.
• Built for Keystone Sporting Arms rimfire rifles shipped with a factory 3/8×24 thread.
• Opens up compatibility with standard 1/2×28 thread protectors and muzzle devices.
• Threads on directly with no gunsmithing required for installation.

Frequently Asked Questions

What does this adapter do? It converts a 3/8×24 threaded barrel to the more widely used 1/2×28 pattern so you can run standard muzzle devices.

What rifles is it made for? It is built for Keystone Sporting Arms rimfire rifles that ship with a factory 3/8×24 threaded barrel.

Buy the Keystone Sporting Arms Thread Adapter

Expand what your rimfire rifle can run up front with this adapter from Davey Crickett, part of our gun parts lineup. Order it from our Lubbock, Texas gun shop for fast, direct shipping right to your door.