Width of a bolt?

[JAmin1588@hotmail.com]

What would be the exact measurement of a bolt, or does it depend on the marker?

[redlaser666]

It depends on the marker and also on the actual body itself. For example a cocker body i have has a bore of .6880 , but i measured a friends and his was .6915.
So the oring-less bolt i made for my marker had a bit of blowback on his.