Watch latest videos, sometimes even early releases! Sign up for the newsletter 🗞️ https://tinyurl.com/9HoleReviews or https://tinyurl.com/SlateBlack One of the key upgrade components to the Special Operations' SOPMOD M4 Block II upper was the "SOCOM profile" M4 barrel: a heavy barrel with M203 cuts. It's been said in civilian circles that this heavy profile barrel has sub-MOA capabilities, creates a rifle that can substitute machine gun fire, and will hold tighter groups when the rifle is heated up. Is this fact or rumor? (because we couldn't' find any type of military published documentation stating any of those benefits) Was it purely to mount a short M203 on? We find out. We'd like to thank Jeff G at @moderntacticalshooting and Ian at @forgottenweapons. Thanks to their input for confirming and expanding on some of the points made in this video! You an also access the Practical Accuracy Scoreboard here 👉 http://www.patreon.com/9HoleReviews Consider supporting us via Patreon! Consider visiting our supporter @SlateBlackIndustries 👉 Discount Code "9HOLE" Shopping on Amazon? Do you like sweet [yet tasteful] gun morale patches? Shopping with this link costs you nothing, but helps support our channel 👉 https://amzn.to/3trn9ju Music by Tyops (THANKS!!!) __________________________________________________________________ We love mail: 9 Hole Reviews 21175 Tomball Pkwy. No. 480 Houston, Texas 77070