Steve and others,

This is interesting to me. Is there special requirements required for a tube to be used for sleeving? Does it have to come from a firearms manufacturer?

Or could any quality machine shop with adequate machines make a tube from quality steel?

What qualities are required for a tube to be suitable for use in sleeving that we can't find suitable local suppliers?

Is there special heat treatment processes or machining processes?

I'm just curious.

Jason