SMALL BASE + STD FRONT CAP + STD BARREL END CAP + STD THREAD ADAPTOR. 
ADDED LENGTH: 153mm OVERALL LENGTH: 171mm DIAMETER: 50mm WEIGHT: 365g

THREAD: M12 X 1, M13 X 1, M14 X 1, M16 X 1, M18 X 1, & IMPERIAL

SUGESTED CALIBER:    .204 > .220 (-1)  

BBG - NF#2 - O1