There are only 2 shank sizes: Large and Small. Some vendors refer to Large shanks as Target action shanks. The Large/Target shank Barrel Nut is shorter than the Small/Standard Barrel Nut regardless of whether it is from a Target action or a Standard action that is Large Shank.
Large/Target shanks are 1.115-20 TPI.
Small/Standard Shanks are 1.055-20 TPI.
Bookmarks