Lightweight cylinder HW 100 carbine recommendation

[Bladerunner too]

So what is the maximum MPa for 6082T6 Aluminium?

Still can't understand why the tube went pop at 150bar though. Also is it legal to send compressed air cylinders in the post? What postal method do you use?

thanks

Are you still confused why the cylinder went pop at the 150 bar? Well maybe it was a tad over 150 bar.and/or been fitted wrong, or maybe i am just suspicious of certain claims.