Q: 1. Does original barrel length matter when JSC converts a normal 16? rifle to a machine gun after it has been converted? I.E., can it ever have a barrel shorter than 16? or would it have to have been manufactured into an SBR before being manufactured into an MG? 2. Can JSC manufacture an AR15 stripped lower receiver, register it as an SBR and then transfer it as an SBR receiver without ever putting an upper receiver with a short barrel on it, or if an upper receiver is placed on it to create an SBR, does that upper receiver have to remain on it until after a transfer has been completed? If a SBR upper is required, can a single 10.5? (for example) upper be used to manufacture multiple SBR lower receivers, or does it have to be 1 upper per lower? 3. If a privately owned AR15 pistol upper with a 10.5? barrel were placed on a JSC owned AR15 lower receiver, would that upper then need to remain with that lower receiver permanently (obviously the lower would then need to be registered as an SBR), or could it be removed and placed back on the privately owned pistol lower while the JSC lower, now a registered SBR in this example, exist without an upper receiver?
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