There is no lie below. There is a different lower for both the M16 and the SP 1. Posted pics for you your ran from. Next, the Ulvalde shooter did not use an AR 15 SP1 or anything that looks like it. He did not use FMJ 5.56x45 NATO rounds, He used expander rounds that are prohibited on the BATTLEFIELD.
Answer the question. I have answered yours today so you are lying.
After you tell my there are two different lowers and which goes with which. You have yet to answer that. That's relevant to your entire argument.
But for the record neither weapon, or the ammo designed for the M16, was used in Ulvalde.
You are running from established fact.
You can use strike thru all you want. It won’t go away. It is proof of how you refuse to man up and honestly answer questions.
Again, when is the last time you fired an M16 or An AR 15 STYLE firearm?
You NEVER answer questions.