Absolutely.... Back in high school (20 years ago) i worked in a small town small walmart type place in the sporting goods department. I went in green only knowing how to load and shoot a FIE single shot 12 guage. That first fall i sold, accesorized, and scoped more guns and bows than i had ever saw before. I think at the time there were about 40-50 bases on the shelves. Thats 1 manufacturer and not including stainless. The differences were the crown on the receiver, 1 and 2 piece bases, and screw depth. There were bases that fit many different brands but the difference were the screws.