The M712 Copperhead is a 155 mm caliber cannon-launched, fin-stabilized, terminally laser guided, explosive shell intended to engage hard point targets such as tanks, self-propelled howitzers or other high-value targets. It may be fired from different artillery pieces, such as the M114, M109, M198 and M777 howitzers. The projectile has a minimum range of 3 km and a maximum range of 16 km.