You can shoot the blue cannon of the Devil Walker (Destiny)
Ive tried this tactic of shooting off the blue cannon 4 times in a strike now.
It does take more time to hit it off than the legs, combined with it being 1 very small target constantly moving as apose to the 6 rather large legs that stay relatively still and slow moving.
In one strike we knocked off a leg and near killed it in a very short time, took it out with supers after. 
Sticking to the legs is definitely a better stratergy, just dodge the bullets.
Complete thread:
- You can shoot the blue cannon of the Devil Walker - 
HuskerAlpha, 
2014-12-12, 21:38 
- You can shoot the blue cannon of the Devil Walker - 
Vortech, 
2014-12-12, 22:08
- You can shoot the blue cannon of the Devil Walker - 
RC, 
2014-12-13, 06:51
- You can shoot the blue cannon of the Devil Walker - 
Blackt1g3r, 
2014-12-13, 20:00
- You can shoot the blue cannon of the Devil Walker - 
Raflection, 
2014-12-14, 07:26
- You can shoot the blue cannon of the Devil Walker - 
petetheduck, 
2014-12-15, 09:40
- You can shoot the blue cannon of the Devil Walker - SteelGaribaldi, 2014-12-15, 09:51
 
 
 - You can shoot the blue cannon of the Devil Walker - 
petetheduck, 
2014-12-15, 09:40
 
 - You can shoot the blue cannon of the Devil Walker - 
Raflection, 
2014-12-14, 07:26
 
 - You can shoot the blue cannon of the Devil Walker - 
Blackt1g3r, 
2014-12-13, 20:00
 
 - You can shoot the blue cannon of the Devil Walker - 
RC, 
2014-12-13, 06:51
 
 - You can shoot the blue cannon of the Devil Walker - 
Vortech, 
2014-12-12, 22:08