No- the Slugger has no provision for a shot bottle, and has very different crimp dies from the Jr. You could conceivably buy all the parts from MEC, but it would cost more than a new Jr. and going from one to the other would likely take at least an hour to do. Used MEC single stage presses fetch between $100 and $200 at local gunshows, so the expense and hassle would be hard to justify.