u/Dangerous-Freedoms

I have a 14.5 DD Block II Upper, wondering what I could do use this upper but functionally allow it to fill a role as a LSW or IAR?

I feel like some comments are going to say, just go buy a RRH or a fight light, I don’t really want to do that. I’d like to beef up or modify what I have to allow for more support fire options.

Heat sinks? Rifle Speed Straight Gas Tube?

Thoughts?