Tight, Consistent Patterns, Less Shot Deformation
Longer parallel section than Carlson's conventional tubes gives consistent shot patterns. Extra smooth interior surface minimizes shot deformation. Laser marked constriction provides fast identification. External knurled ring extends approximately 3/4" from end of barrel for fast changes between stations. Can be used with steel shot.
Big Book Catalog, Issue:72, Page:197
SPECS: 1704 stainless steel. Constriction (SIZE). Threads are as follows - Beretta - 12 ga., plus Benelli M1 and Super 90, 12 ga., .810"- 1mm.