See first quotes from Robert Page Preston
| energy gun n. | 1934 Land of Twilight in Amazing Stories Dec. xiii. 123/2 When a Verean got momentarily free of his attacker, the little energy-guns did their workβ¦. At last the slaughter was over. |
| energy rifle n. | 1934 Land of Twilight in Amazing Stories Dec. 117/2 We saw Vereans pointing the energy rifles above them. |