For a suppressor, or most any use without a barrel mounted M203, the Noveske N4 contour makes much more sense, and it's cheap compared to the Colt SOCOM profile units.
I got a CMMG SOCOM profile 14.5" as my first rifle - have it next to me right now and still love it, but it's a heavier rifle than it needs to be, and having learned what I know now I'd be cost ahead getting a simpler barrel profile and saving money by using a cheaper and lighter stock as well (STR instead of a UBR at the moment) and end up at a lighter overall weapon without giving up accuracy or massively increasing cost.
All the added mass is great for short high round count use, since that's the area of the barrel that gets hot the fastest, but for the volume I shoot through this thing the standard M4 contour would have made more sense.
عندما تصبح الأسلحة محظورة, قد يملكون حظرون عندهم فقط
کله چی سلاح منع شوی دی، یوازي غلوونکۍ یی به درلود
"Being able to do the basics, on demand, takes practice. " - Sinister