I have a Surefire X400 and a Surefire X400 ultra... one is mounted on a Glock 19 next to my bed and the other on a Volquartsen Scorpion 22lr... they do not have the strobe feature... I've killed all kinds of critters in the dark with the Volquartsen... unfortunately I haven't had the luck that Dave has with Streamlight products...
