Yeah. I got it. Run from the facts. Did you see I posted the definition of variant for you?
Which makes it a different weapon. That is why there are differences in the lowers I posted. Two different weapons with different purposes.
One lower had the three position selector. Safe, semi, auto. And was stamped Colt M16A1, CAL 5.56 mm. The other was a two position selector. Safe and Fire. And was stamped Colt AR15, CAL .223, MODEL SP 1.
And that is why you were afraid to answer honestly. Take this education and use it properly.