9mm s and w model 5904 with a 4 barrel what does tcp stand for?

In the context of the Smith & Wesson Model 5904, "TCP" typically stands for "Tactical Combat Pistol." This designation often implies features designed for improved handling and performance in tactical situations. The Model 5904 itself is a semi-automatic pistol known for its reliability and is part of S&W's third generation of pistols.