I’ve been enjoying the SOTAR videos on YouTube so I figured I would pose the question here. I’m selecting parts for a lower I have and given all the reputable manufacturers offering extension are some better than others? I’m an A5 koolaid guy - is there a difference between the BCM intermediate extension and the VLTOR? It stands to reason VLTOR makes both. Geissele is making carbine extensions these days - what about the magpul extensions? Differentiation is becoming difficult.