barrel threading and crowning vegas gunsmith ?

[rockwind]

i bought some suppressors, now i need to have a few barrels threaded, and maybe crowned on 2 of them.
is it really that difficult to remove the stock and barrel? i am very handy, just never delved into gun stuff that much.

what is a good price for threading? and crowning if necessary?

any recommendations if i have to ship somewhere?

would like it done pretty quickly if possible.

thanks for any advice.