The United Kingdom special forces are comprised of the SAS or Special Air Service, the SFSG or Special Forces Support Group, the SRR or Special Reconnaissance Regiment and the SBS or Special Boat Service.
The SAS or Special Air Services, a division of the British Army and is one of the most widely known and respected [...]

The Heckler &Koch MP5 is probably the weapon of choice for Close Quarter battle(CQB) and Counter Terrorism Operations. Used by the British SAS &SBS, the German GSG9 and many other special forces units around theworld the MP5 and variants have seen more operational CQB experiencethan any other comparable weapon.
The US Navy issueda project specification designed [...]