NSG - Frequently Asked Questions What is the full form of NSG in Central Armed Police Force, Job Title, Military and Defence? Expand full name of NSG . What does NSG stand for? Is it acronym or abbreviation? The NSG was modelled on the pattern of the SAS of the UK and GSG-9 of Germany. It is a task-oriented Force and has two complementary elements in the form of the Special Action Group (SAG) comprising Army personnel and the Special Ranger Groups (SRG), comprising personnel drawn from the Central Armed Police Forces / State Police Forces. Ministry of Home Affairs,MHA, NSG ,National Security Guard,Armed force,Defence. The UPSC test requires knowledge about the National Security Guard ( NSG ). Learn more about NSG Commando full form , salary, & director general.