HornadyA(R) Subsonic Ammunition doesn't have the loud report of a supersonic round, and paired with a suppressor, it's even quieter. Unique powders optimized for subsonic use result in a low flash signature, ideal for either suppressed or unsuppressed performance. The Sub-X projectile features Hornady's legendary Flex-TipA(R) inside the hollow point cavity for reliable expansion at low velocities.