A total of 334 junior-high students (167 females and 167 males) in upstate New York completed a self-report questionnaire. In addition to family composition and other demographic issues, the questions focused on relationships with parents, emotions and moods, gun-related beliefs and experiences, and aspects of aggressiveness. The primary issue for the study was possible links among individual differences in gun ownership and recreational use of guns, beliefs about the effects of gun use, and aggressiveness. Correlation coefficients and regression analyses found that males who had more experience with guns reported reacting more violently to frustration, and they also admitted to having participated in greater numbers of violent incidents. Girls who indicated they were alienated from and dissatisfied with their mothers felt generally more upset and unhappy, reacted angrily to frustration, and more often expressed aggression toward persons and objects. Both boys and girls whose families owned and used guns tended to believe that gun-use had innocuous effects. In attempting to explain the correlations between recreational gun use and aggressiveness, the authors suggest that adolescents' experiences with guns in killing animals might contribute to emotional arousal, beliefs, and expectations that violent acts can give them power over others, especially those who thwart them. These learned reactions, in turn, could dispose them to become more aggressive toward humans in addition to animals. This conclusion is consistent with Anderson's (1997) General Affective Aggression Model. 3 tables and 34 references