Oog. Thanks for that bit of information. Here I was all excited to learn about Vulcan -- my wife wants a new AR-15 for her birthday -- but now I'll go back to looking at Bushmasters and Olympics. One of my shooting buddies has a Hesse Jam-O-Matic and spends more time fixing it than shooting it.
Bushmaster...another fine carbine. Can't go wrong with one of those babies.
Don't forget to check into Armalite (M-15?) as well. For a good check on pricing, I go to: http://www.impactguns.com.