If you want to get adventurous, it is 1/8 th inch pneumatic tubing.
__________________ --- UNDRPRVLGD Goggle Straps n stuff ---
If this be treason, make the most of it.-Patrick Henry
I'm a damn veteran, I've got more rights and privileges than you do.
MQ2 rebuild kits, MP4 ram rebuilds, general 'cocker teching
Will soon be making super slick mid/half block bolts