9x19mm PB1s

 is an ammunition that appears in S.T.A.L.K.E.R.: Lost Alpha.

"An improved round for the Walker P9m and the Viper 5 submachine gun. A high-powered round with a hollow-point bullet and an armor-piercing core."

- Inventory description

Overview

 * An improved round with better armour piercing capabilities for the HPSS-1m, Martha, Walker P9m pistols and the Noiseless Viper, Viper 5 sub-machine guns.