I'm a house painter and use Kilz 2 often however I've never had a Wagner sprayer in my hand. Unless you have a floor model airless sprayer you will have to thin the Kilz to spray it. I kind of consider the Wagner sprayer a toy sprayer so I can't picture being able to use it with the Kilz 2 without thinning it a lot. Primers have a lot of filler making them thick to cover better so it takes a lot of pressure to push it through the gun. A conventional sprayer with a compressor won't be that much better either. It would take a pressure pot with the compressor and sprayer to spray the kilz. Even though, a little thinning would be required.
While on the subject if you are using the kilz to cover a stain the kilz original will usually do better.