can anyone help me to aquire info on a replcaement bolt for my car-15 olmpic arms. i went to olmpic arms web site and found out they are currently not selling bolts for the ar-15. and when i replace the old bolt with a new one, is headspace a critical issue i shlould be concerned about? any ifo would be greatly appreciated.  
                thanks, meateater

 You can buy a bolt anywhere. Brownells, Bushampster, ect.

 Chances are the headspace would be tighter, rather than excessive with a new bolt.

www.dpmsinc.com
www.bushmaster.com
www.jtdistributing.com
www.model1sales.com
www.armalite.com

Any of these outfits will supply a good quality bolt.  No, headspace will not be an issue unless your barrel is very, very worn.  Drop it in and go shoot.  I have bought parts from all of these  except Model 1 Sales, but have been assured by friends of the quality of their products, too.

From all of them, a complete bolt will cost about $50.  So, take your pick.

thanks for all the info and help,  god bless america!

i do mean god bless america!!!