About 1/2" X 36 Tpi Barrel Thread Protector Standard
9MM 1/2" x 36 tpi barrel thread protector. 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 .730 With a clean crisp knurl. This thread protector works on most standard AR 9MM barrels and variants. 100% Made in the USA! Please confirm size before ordering.