sniper weapons for SGII

Q. Just for the record whats the go with the Heavy Anti-Material Rifle 
(HAMR? and yes I've read the little blurb on page 27. Is it supposed to 
be a rifle that fires "anti-matter" slugs or is it just given that name 
because of the nasty effect it has on any target it hits.

Regards to all readers 
Trevor Dow