ET ARMS PLUM CRAZY AR15 LOWER RECEIVER

[Atlantic Firearms.com]

ET Arms Plum Crazy Gen II AR15 Complete Lower Receiver. This complete lower includes everything you need to attach your favorite AR15 upper receiver to create a complete firearm. The stock, trigger, buffer tube, and grip are all included. Get one now for your next build.

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[outrider58]

Would that transfer as "Other" or "Rifle"?

 

[Atlantic Firearms.com]

Would that transfer as "Other" or "Rifle"?

It would be considered a "firearm" for transfer purposes.