The GreyWolf was first seen in the innersphere in 3052.  
By then Comstar was able to learn the clan designation 
before the design was seen in combat. It was immediately 
recognized for its efficiency.  Its design is somewhat 
reminiscent of the Mad Cat.  Its smaller size and less 
diverse weaponry suggest, however, that it may be an 
earlier model.  Even its name, GreyWolf, links it to the Mad 
Cat, who's clan designation is Timberwolf.  While the 
GreyWolf holds many similarities with the Mad Cat, it has 
quite a few differences.

Capabilities:
While the base chassis on the GreyWolf carries no extra 
heatsinks, almost every single variant carries extra 
heatsinks in a series of pods along the back torso and in 
some places on the arms.  With EndoSteel, FerroFiberous 
armor, and an Extra Light engine, the GreyWolf is able to 
carry 31.5 tons of pod space.
The most common configuration carries one LRM 15 
launcher in each arm with one ton of ammo per launcher.  
An ER PPC in each side torso doubles the Mechs 
firepower.  While this armament gives the GreyWolf good 
long range attack capabilities, 3 small ER lasers in the 
torso can add even more damage at closer ranges.  
However, using all the weapons at once can cause 
overheating.
The A variant incorporates Pulse Laser technology by 
replacing the ER PPCs with Large Pulse lasers and two 
torso mounted ER small lasers with Medium Pulse lasers.  
In order to deal with the added tonnage the Arm mounted 
LRMs are dropped down to only 10 Tubes.
The B variant is relatively common and uses the 
lightweight ER Large lasers on its torso mounts in order to 
free up enough room for 20 LRM tubes in each arm.  
Taking out two of the torso mounted support weapon 
mounts, they are able to add a shared ton of ammo, giving 
each LRM launcher 9 shots.
The C variant utilizes ballistic weaponry and only has an 
ER small laser for energy weapons.  The two LRM 15's 
remain in the arm pods, while the torso pods encase an 
LBX 10 autocannon, and an Ultra autocannon 10.  While 
the Ultra AC 10 is small enough to store ammo in a 
compartment directly adjacent to it, the LBX is so bulky 
that the ammo must be stored in the adjacent arm pod.
The D variant is a decided short-range fighter.  The arm 
mounted missile pods contain twelve SRM tubes each, 
and six Medium Pulse lasers are mounted in the side 
torsos.  If allowed close to its enemy, this variant is truly 
terrifying. 

Deployment:
Appearing in only moderate numbers in all of the clans, it 
has its largest concentration in clan wolf's forces.  With 
the amount of power this unit possesses, it is surprising it 
has not been seen more frequently.