| English | Russian |
| condition one | на боевом взводе (Col. Jeff Cooper, who codified a number of "conditions" of a pistol. Each condition represents one step closer to being ready to fire and a corresponding descending number of actions required to fire. Condition One, aka cocked and locked, is where a pistol has been loaded, charged, the hammer is fully cocked and the manual safety engaged. Kazuroff) |
| condition one | со взведённым курком (Kazuroff) |
| grooves with twist of one turn in 12 inches | нарезы с крутизной в 1 оборот на 12 дюймов (ABelonogov) |
| one-handed weapon | револьвер (ABelonogov) |
| one-handed weapon | пистолет (ABelonogov) |
| one-hundred-percent rectangle | прямоугольник полного рассеивания (one hundred percent rectangle (A) – Area which includes practically all the shots fired by an artillery gun or battery at a target || see also: rectangle of dispersion (A) Area, assumed to be rectangular, in which the projectiles of a piece will fall when the piece is fired with the same firing data under apparently identical conditions  fas.org ABelonogov) |
| one-hundred-percent rectangle | прямоугольник 100% попаданий (one hundred percent rectangle (A) – Area which includes practically all the shots fired by an artillery gun or battery at a target || see also: rectangle of dispersion (A) Area, assumed to be rectangular, in which the projectiles of a piece will fall when the piece is fired with the same firing data under apparently identical conditions fas.org ABelonogov) |
| one-piece frame | рамка, изготовленная из одного куска метала (ABelonogov) |
| one-piece resizing die | обжимочная матрица-моноблок (ABelonogov) |
| one-piece stock | ложа, изготовленная заодно с цевьём или из одного куска дерева (ABelonogov) |
| one-quarter deflection | вынос точки прицеливания на четверть фигуры (ABelonogov) |
| one-side character of bulge | одностороннее раздутие (ствола ABelonogov) |
| one turn of rifling | шаг нарезов (ABelonogov) |
| one turn of rifling in calibers | шаг нарезов в калибрах (ABelonogov) |
