It doesn't mean "different rifle".Huey » 27 Jun 2022, 3:24 pm » wrote: ↑ No ****.
Variant:
a form or version of something that differs in some respect from other forms of the same thing or from
That is why there are two separate lowers. Because they differ. Variant does mean “the same”.
That is all not relevant to the subject. None of those weapons were used nor was the ammo designed for the military used.