Many use the integrated silencer, which is correct. However, I prefer a more visually accurate build, capturing the suppressor to barrel ratio. It gives you greater mobility and this build helps mimic the Stalker perk from Ghosts. I used this back in the day all the time. I think it's a better CQC build more than anything, and also is more in line with the "Ghosts' version. Maybe I should revisit the 74-U next?