Fully automatic , so what?
Does it improve the rate of fire ?
Rate of fire is dependent on the barrel ability to withstand the
heat generated during firing w/o being damaged, so with full auto
w/o improving the rate of fire is totally waste of money!!!
Not only that, you still need to maintain the automated
system!!!
So with at max rate of fire at 10 rds per min which the burst rate
which could only be sustained for only 2 min, i.e. 6 sec per rd for
2 mins , which could be easily handled manually , so why bother to
have fully automatic !!! 
It is better to have system that could be more quickly deployed,
for example the lightest Dragon system is to be towed by a HUMVEE,
whereas our SRAMS could be mounted on the HUMVEE and fire directly
from there, so it should has much faster deployment!!! 
Let me enlighten you abt what is burst rate and what is sustained
rate of fire,
Burst rate is max rate of fire which could be sustained for only a
min or 2.
Sustained rate of fire could be sustained for much more longer but
with much lower rate than the burst rate.
Dragon Fire, max(burst) rate is only 10 rds per min for max of
2mins,
Sustained rate is only 4 rds per min.
http://en.wikipedia.org/wiki/Dragon_Fire_(mortar)
As for SRAMS, max(burst) rate is 18 rds per min
And the sustained rate is abt 10 rds per min
http://www.stengg.com/upload/620JKKP6Y94P4nl3aZf.pdf
