I just want to point out that the AR-15, to include the M4 Carbine, is a shit rifle. It jams too fucking easily because of the direct impingement system filling the breech with carbon and nastiness, and that shit mixes with the dust of Afghanistan, causing jams that are hard as fuck to clear. It fires a small, fast round that is shit at killing, tends to overpenetrate, and has no fucking stopping power. The only good thing about the M4 is the cheek-to-stock-weld feel and straight alignment of sight. The only worse decision the military made was to replace the 1911 with the Beretta 92FS/M9.
AR-15: I fucking hate you. You suck. I’d rather have a firearm with a gas-piston system or something more reliable that fires a 7.62. Fuck you, AR-15. Fuck you in the goat ass. You nearly got me killed.