[Kriss]

Hello all fellow airsofters!
I just saw on uncompany, that they had some Alumiuium bbs. 200bbs for 10$.
I was thinking about getting some, just to see how big damage they do at impact. Anyone know if this is suitible for any gun? My idea was to test it with the m3 beneli from marui.
Is these dangerous?
Anyone ever tried them?
How much do the weigh?
Will the aluminium destroy the inner parts? barrel, hopup?

Thanks,
Kriss