Davis Gun Firing (IMAGE) DOE/Sandia National Laboratories Caption A test B61-12 nose assembly fired from Sandia National Laboratories' Davis gun splashes water from an 8-foot-deep pool as a 2,000-pound reaction mass sails into the air from the other end of the gun in a successful impact test at New Mexico Tech's Energetic Materials Research & Testing Center. The reaction mass eliminates the recoil load in the gun chassis during firing. Credit Sandia National Laboratories/Randy Montoya Usage Restrictions credit Sandia National Laboratories License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.