Take a look at the KAC CRS/PRT if visual signature is a concern: https://www.m4carbine.net/showthread...chnology/page3, https://www.forces.net/technology/we...ines-new-rifle
Although this video is not done IAW a scientific protocol and is thus still subjective, shooting the PRT suppressor under NODS looks really impressive on this guy's camera, the first round flash is less noticeable compared to many competing models and the PRT is managing the heat better than a lot of competing suppressor models: https://www.youtube.com/watch?v=DH2OmUZK7eQ.