Ok guys, i've been searching and waiting, and an M4 with my name on it is now on the way! Managed to snag an 11707 in the mad rush, and kinda felt like how crazy crowds of women get at a shoe sale! (no offense ladies but us guys are afraid of you) Anyhoo, what do i need to buy for this awesome piece of machinery. Besides the factory 2 shot extension. What kind of tac lights are you guys using, upgrades, slings, mounts, reflex sights? Lets make it look even scarier now! And anyone tried using flechette in this weapon?