The T.REX Lower Parts Kit is a bare-bones kit that doesn’t come with a trigger guard, grip, or a fire control group. We prefer these kinds of kits because they allow us to choose our parts based on our preferences instead of swapping out the parts we don’t like and ending up with unnecessary spares that pile up over time. This kit is made for us by Schmid Tool, has no MIM parts, and meets or exceeds Mil-spec standards.