Just to clear up, the Sig is only used by the US Seals to my knowledge, out of US forces anyway...
Aside from that it's a Swiss design and we also use them in the army. Though, I think only our higher ranking officials carry any side arm at all.
Just for the record SIG Sauer is a US company and manufactures the P226 in Germany and the US. SIG is the parent Swiss company. SIG Sauer was SIGARMS up until Oct 2007 when it changed its name.
SIG pistols are currently in use with:
U.S. Dept. of Homeland Security (largest U.S. non-military contract)
U.S. Navy SEALs
U.S.Navy SWCC
U.S. Federal Air Marshals
U.S. Secret Service
U.S. Coast Guard
U.S. ATF
U.S. Department of State Diplomatic Security
U.S. Naval Criminal Investigative Service (NCIS)
U.S. Army 902d Military Intelligence Group (M11)
U.S. Army Criminal Investigative Divison (CID)
USAF OSI (M11)
U.S. NAVY Aviators (M11)
1/3 of all U.S. State & Local LE
UAE Police Force
Federal Protective Service
British MOD and SAS
Canadian Military (P226)
Chile PICH
Colombia CNP and Army
Egypt Presidential Guard
Egypt Army
France pistols and rifles in use by Police Nationale, Gendarmerie and Douanes
German Customs and Border Control
8 German SEK units
GIGN French Special Force
Hong Kong Police – P250
India NSG & various Police
Indonesian Defense Forces
Jordan - KASOTEC and SF
Kurdistan PSS
Netherlands National Police
Norwegian Special Forces
Saudi Arabia SF Academy
UAE Force 7
This info is all taken off their website
Anyway back on topic, heres a picture from last weekend of me and some of the Myrmidons (another team that play at Gunman Airsoft) all kitted out in SBS/SAS Taliban Hunter gear: