Just like there’s Heavy Reinforced Door (Variant B) , there should be one gate to match. Basically a see through gate.
I use the Heavy reinforced door variant B to see if there is anyone hiding at the other side, same would apply for the gate.
You can use arena gate you can see through one of them. I like the idea of a see through gate that would fit in all the rectangular gate frames.
@Kamme, Welcome to the community. @sestus2009 is right. The coolest things unfortunately are inside dlcs. Still fortunately dlcs are not so expensive 
. I buy them one by one, really slow because I want to fix constructions with them and learn all their pieces. The combination of all dlcs will give you the best outcome .