After 1985, Austrian Glock pistol with polymer sleeve seat almost occupied the military and police pistol market in many countries, which prompted many companies to develop polymer sleeve seat pistols. In 1999, SIG Arms of Switzerland introduced the polymer sleeve pistol SP234/SP29, and sold it under the trademark "SigPro". In 2, the small arms division was awarded by Sauer, JP&; amp; Sohn GmbH) merged, but continued to independently develop and operate, but the new product was changed to the name of "Sig-Sauer". In 22, in order to participate in the pistol selection test of French government law enforcement agencies (police and national gendarmerie), Sauer Company introduced Siger Sauer SP222 pistol, which was selected and signed a contract. Later, the gun began to compete for the American market, and was selected as the standard by the US Army in 25. At the same time, the gun also strives to compete for the civilian pistol market. Therefore, SP222 can be described as a rising star of military and police general pistol, and it is competing with Glock pistol for the market.