So I got my suppressor back from SiCo. It gained a little weight. Not much, but a little. The can, with the end cap but without the thread adapter now weighs 7.5 ounces. The can, with the end cap and thread adapter weighs 8.7 ounces. I went back through my camera and I didn't take a pic of the can when I got it without the thread adapter but I did get one with it. It weighed 8.2 ounces so it gained a half an ounce.
One thing to keep in mind is that they did not replace, nor clean my thread adapter. It is carbon coated pretty heavily so that likely has something to do with the weight gain. If memory serves me, the weight of the can without the adapter was 7.2 ounces but as I mentioned, I didn't get a pic of that but if that's true, it gained .3 ounces. If that is due to heavier welds or beefier baffles, I don't know but it is undeniably heavier.
The question I have posed to SiCo is whether this is just my suppressor that has gained weight from the repairs or if this is a change to the line itself. I asked that question and was told he would get back to me. Apparently, because this was my second time back, they regular warranty team didn't make the repairs but it was sent to the engineering guys who handled it personally. That leads me to think it might be a one-off solution.
Either way, I'm happy with it and will go shoot it on my regular firing schedule and enjoy the crap out of it.
Here are the pics with and without the thread adapter and the pic from Feb of 2024 when it was new.