Question: can an sbr have a folding stock?
Answer: While it is legal to add a Stock or a Folding Stock to a pistol, doing so will create a SBR which must be engraved and approved using an ATF Form 1 prior to doing so. In fact, having a stock and a pistol in close proximity with the present ability to configure it as an SBR could be constructive possession of an SBR.