I can only assume that it is a typo by one of the Buds Gun Shop staff members. This is a competition gun so they probably inserted compact instead of competition. Sometimes the titles differ from the description. It's just mistakes that Bud's Gun Shop has to clean up. Because it cannot be a compact with a 30 inch barrel. I know the bus stock can be adjusted a bit but not to make it compact. So like I said, they probably just meant to put competition instead of the word compact. That is the only thing that I can think about at this moment. I hope this helps. Oh, I forgot to add this part. We are not Buds Gun Shop employees. We are simply fellow shoppers assisting each other.