rec.pyrotechnics - join
Fireworks, rocketry, safety, & other topics.
Medium activity, 816 subscribers, Usenet

rec.models.rc.air - join
Radio-controlled air models.
Low activity, 642 subscribers, Usenet

rec.models.scale - join
Construction of models.
High activity, 953 subscribers, Usenet

rec.guns - join
Discussions about firearms. (Moderated)
High activity, 2487 subscribers, Usenet

sci.space.history - join
Historical manned and unmanned space flight programs.
High activity, 665 subscribers, Usenet

alt.engr.explosives - join
BOOM.
Low activity, 146 subscribers, Usenet

Pyrotechnics - join
Pertains to the use, manufacture, and optimization of fireworks and other pyrotechnical devices.
Low activity, 58 members

sci.space.shuttle - join
The space shuttle and the STS program.
Medium activity, 605 subscribers, Usenet

PVC Motor Rockets - join
Dedicated to Experimental Rocketry, Scratch Built Rocketry, Rocketry Vendors, Rocketry Resources, Exchange of Ideas, Sugar Motors, APCP, High Power Rocketry, Model Rocketry, Assembly Techniques, Finishing Techniques, Flight Reports
Low activity, 140 members, restricted