The T-Bolt gets its name from the “T” shape formed by the locking lug that sits perpendicular to the bolt body. It forms the top of the T. The bolt handle is connected to the bottom of the T, and pulling on it moves the locking lug sideways in the receiver. Once the locking lug clears the receiver wall, the bolt assembly moves rearward. Operating the T-Bolt is noticeably faster than a traditional bolt because instead of lifting the bolt up and then pulling back, the shooter simply tugs it rearward.
Bron: guns&ammo