B&T AG (formerly Brügger & Thomet AG; sometimes rendered B+T) is a Swiss defence supplier specializing in the design and manufacturing of firearms and tactical components such as sound suppressors and rail systemsBrügger & Thomet AG was established in May 1991 by Karl Brügger and Heinrich Thomet to produce suppressors for the domestic Swiss market. Some time after, Heinrich Thomet withdrew from the enterprise and sold his shares to Brügger, who remains the sole owner of B&T. The company name was changed to B&T AG in 2011.

In 2004, Brügger & Thomet started to produce its own line of complete weapons, beginning with a revised variant of the 9mm Steyr TMP known as the MP9 submachine gun, and a civilian semi-automatic model called the TP9. This would later be accompanied by the 7.62mm APR308 sniper rifle and the long-range APR338 version chambered in .338 Lapua Magnum. In 2006, B&T released the GL06 40×46mm grenade launcher, with the APC9 submachine gun being released in 2011. In March 2019, B&T released its APC9 Pro model which improved upon the previous design with a non reciprocating charging handle and a replaceable pistol grip compatible with grips designed for the AR-15 style rifle family of firearms. The APC9 Pro features an optional lower receiver capable of using Glock magazines. In 2020 B&T released its APC10 model in the 10mm Auto.

B&T is used by the United States Army, United States Air Force, Ukrainian Security Forces,  French Police, Miami Police, Argentine Army, Slovak Police Force, and the Military Police of Brazil.