GZG DSII WAM - What are they?

Hi!
I've been looking at John's house rules in his site and came across:

>WAMs: All within 2" of marker are attacked. This represents not a
couple
>hundred buried mines, but a couple dozen WAMs arranged in a rough
>circular
patter. Attack procedure is to roll as normal attack--WAM is always
>assumed
to be at close range, may be basic, enhanced, or superior. WAM >gets +2
bonus to represent surprise value. 3 chits, validities as per MAK.
>Damaged
result is damaged, not M-kill, and it attacks top armor. May be laid >as
per
DSII normal rules, but dispenser only takes up 4 capacity points and a
>reload takes up 2. May be laid by VTOLs or DFO pods from aircraft.

My question is: what's a WAM?

Andrew Martin
Shared email: Al.Bri@xtra.co.nz
Web Site: http://members.xoom.com/AndrewMartin
Dirtside II Web Site: http://members.xoom.com/AndrewMartin/DSII
Dirtside II FAQ Web Site: http://members.xoom.com/AndrewMartin/DSII/FAQ