The barrel thread protector has a 9/16×24 thread is machined from US made stainless steel to very high quality standards on CNC lathes in my shop. It is counter bored to accommodate barrels that are not undercut at the shoulder.
Length is .625″
Outside diameter is .750 With a clean crisp knurl.
This thread protector works on Just Right Carbines and variants.
100% Made in the USA!
Please confirm size before ordering.