The Ruger 10/22 Thread Protector features a 1/2-28 thread specification with a durable blued finish designed specifically for Ruger 10/22 rifles.Ruger 10/22 Thread Protector1/2-28 thread specification for proper fitBlued finish for corrosion resistanceProtects barrel threading when not using muzzle devicesOEM Ruger accessory for guaranteed compatibilityEssential for protecting your rifle's threaded barrel from damage and debris when not using a suppressor or other muzzle device ensuring clean threads for future accessory installation.