Didn't think it was. I have to do a wear ring swap on my buddies GTX. I'll order one along with the wear ring for him. They're like $10 off eBay so no biggie.
Well I've not had any luck, removing the wear ring using the freezer method with any pump. The wear rings do go in a little easier. One trick I have learned is to use a multitool instead of a sawzall for removing the wear ring. I just have a cheap one from Harbor Freight.