I contacted ANS' support via Live Chat. I was told these would work for a Spyder Shutter. They do not, they are too short to stop the balls from rolling out. They are however the same shape and do "fit" in the gun, just the nipple is about 1/8" short.
In short, I was mislead, not a huge deal since they're only $1.50, just an FYI to others.
Was Told It Would Work 
