Weres would be good for handling heavy machine guns, and they would be able to control the heavy recoil.
They might be even capable of handling a .50 caliber Gatling Gun, spewing 1,300 rounds per minute.
Back to snipers. The were's strength and speed would be an asset to handle heavy sniper rifles, like the one used to pierce tanks with. Don't forget, they could handle more ammunition, too.
I am not going to get into the Logistics of outfitting a small crew of Were's with a GAU. But I will point out that 1,000 rounds of .50BMG, not counting the weight of the boxes, nor the belts, is 261lbs. The U.S. Military already has the M2, but generally the .30 Caliber Machine Guns are more manageable in the scenario you are trying to paint. Vehicle mounted weapons are vehicle mounted due more to the Logistics of the Ammo, than they are the weapon itself. The light version of the GAU for instance is 106lbs, not counting the battery pack used to spin the barrels. The M2 weighs 83lbs and doesn't need Battery packs. But that ammo, still weighs 261lbs per 1,000 rounds.
Were's as Snipers...This falls under the Special Forces purview. All of the things that would make Were's good for Special Forces would also make them Good Snipers. But there is more to being a Sniper than just hauling heavy equipment. The Were's temperaments for instance. That high aggression does not help a Sniper. That short temper, does not help a Sniper. Snipers are not just for shooting things long distance. They are information gatherers. Scouting and Observation is the much bigger scope of what a Sniper does for the military. Long hours staying in one place keeping eyes on an enemy. How do you keep that Sniper fed in the field? How long can a Were go on Light Field Rations if he can't shift to forage for the food he needs to keep his Wolf content? How well could the Man do his job if he is constantly fighting his Hungry Wolf? Then add in the solitude. Sure, you will have the one off Lone Wolf who is probably top of the charts in the Sniper gig, but he or she will be the rare exception. So rare, they may not even exist for other reasons. Their already Anti-Social behavior for instance may have prevented them from passing Psyche eval for example.
There is a lot bigger picture to take in when it comes to figuring out Military positions and equipment uses. There are tasks that we can think of that at first blush would scream "A Were would be awesome as this!" and then, the Logistics of the Full Expanse of the job or task settles in and..."Okay, so a Were isn't really an advantage."
Sure, there will be things a Were will always be able to execute better in the short term, but it is the long game that might bite them and make them stumble, especially when it comes to Military Logistics.
In the General Special Forces Roles, Were's would be an advantage, no questions there. It is just, we have to look really close at the full job when it comes to some of the more Specialized roles personnel play in Military service. If we ignore the Oxymoron that is Military Intelligence, I can assure you, there is someone, somewhere in the Military Think Tank of Mercy's World that is thinking up Specialized Operations that are based around what they know of Were's and their Abilities and how best to Exploit them on a Mission by Mission basis.