The Pencil barrel thread protector 1/2 – 28 thread is machined from 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 .630 With a clean crisp knurl.
This thread protector works on most AR15 .223/5.56 pencil barrels and variants.
100% Made in the USA!
Please confirm size before ordering.