Razor's gun

From Tardis Wiki, the free Doctor Who reference

While posing as a "Mr. Razor" aboard a Mondasian colony ship, the Saxon Master carried a gun, (TV: World Enough and Time) separate from his laser screwdriver. (TV: The Doctor Falls) While confronting Missy, "Razor" briefly pointed the gun at her only to toss it aside before revealing his true identity. (TV: World Enough and Time)