SMALL BASE + STD FRONT CAP + 100mm REFLEX + STD INTERNAL REFLEX BRAKE. BBG - NF#2 - O11SUGESTED CALIBERSelectADDED LENGTH (mm):157OVERALL LENGTH (mm):258DIAMETER (mm):50WEIGHT (g):561COMPONENTS SelectTHREADM12 X 1 M13 X 1 M14 X 1 M16 X 1 M18 X 1 & IMPERIAL