SMALL BASE + LARGE BRAKE FRONT CAP + LARGE FRONT BRAKE + STD BARREL END CAP + STD THREAD ADAPTOR. BBG - NF#2 - O4SUGESTED CALIBER.204 > .220 (-1)ADDED LENGTH (mm):209OVERALL LENGTH (mm):227DIAMETER (mm):50WEIGHT (g):501COMPONENTS SelectTHREADM12 X 1 M13 X 1 M14 X 1 M16 X 1 M18 X 1 & IMPERIAL