1/2 x 28 Thread Protector Pencil Barrel .630 Dia .625 Long

1/2 x 28 barrel thread protector 5.56 .223 .22. It is machined from US made 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. It also has a durable Black Oxide finish. Length is .625" Outside diameter is .630 With a clean crisp knurl. This thread protector works on most AR pencil barrels and variants. 100% Made in the USA! Please confirm size before ordering.