Surefire Copper Bezel

[easilyled]

for BeCu, as long as proper precautions are taken when machining, it's okay. machine wet and make big chips.

For your personal safety, I wouldn't touch BeCu with a bargepole if I was a machinist. Even with precautions the microscopic dust can result in chronic incurable lung disease for quite a high percentage of people who are more susceptible and there isn't any way of telling who will succumb. Its gambling with your health.