Many of the pistol cartridges are subsonic, including .45ACP and .380ACP. Some 9mm ammo is subsonic and is so designed by the manufacturer. In 9mm, subsonic ammo has bullet weight of 147 grain and heavier, although not all 147g ammo will stay subsonic in a machine gun or carbine.

For .22 rimfire, several manufacturers produce specific ammo for silencers. Some of the higher quality standard velocity target ammo may be subsonic. Note- "High Velocity" .22 ammo is NOT subsonic. It will function just fine in your suppressed pistol or rifle, but may exhibit much higher noise levels.

  There is high demand for subsonic rifle ammo, however, there are very few companies who can produce this ammo. Most we have tried have unstable flight characteristics. Most manufacturers of silencers will NOT warranty the use of centerfire ammo in their cans. The ONLY subsonic centerfire which will be warranted is manufactured by Engel Ballistic Research, and we carry it in both .223 and .308 calibers.