What is a polygonal pistol barrel?

Answer 1

Well, a polygonal pistol barrel is a type of barrel that has a polygonal rifling instead of traditional grooves. This rifling design helps improve accuracy and velocity of the bullet as it travels through the barrel. Just like painting, different techniques can create beautiful results - each barrel design has its own unique benefits.

Answer 2

Most rifled firearms have a bore that is round, and has spiral grooves (the rifling) cut inside the bore. However, some guns (notably most Glock pistols) use a different system. The cross section of the bore is a polygon, with several flat surfaces. These surfaces twist in a spiral as you pass up the bore. It is claimed that produces a higher velocity than standard rifling, but it cannot be used with unjacketed lead bullets.