I have been told that it is a B18/B19 platform. However, when Crosman brings out a new product it usually takes them about a year to produce "parts" specific to it for sale- so if it appears in May of this year, the stock may not be available as a "part" until May or so of next year. In the meantime, they will exchange defect rifles for new ones as required until they build up a little stock of parts for their warranty-use only.