The A2 stock is a little too long for my son and he is simply looking through the sights here, but the M16A4, or in this case the Colt AR-15A4, is hands down my go-to SHTF weapon.
I believe an ACOG is in the not-too-distant future.
Also, I finished our 14.5 Geissele URGI upper build. I added an Aimpoint CompM4S and Cloud Defensive Rein 3.0 which has a ridiculous amount of throw. The Lower is LMT with a government issue SOPMOD stock and taupe Knights grip:
