I'll bet it's a bushy. I've got a 16" flattop Colt H-Bar myself. Nice weapon.
As tempting as it is, I'd
strongly advise against accessorizing it just yet. Learn how to shoot it with the iron sights first ... and shoot the hell out of it before you start shopping. In fact, you ought to think about attending a school like Gunsite or Front Sight or Thunder Ranch - enrol in an introductory tactical carbine/pistol course ... believe me, you'll enjoy your weapon soooo much more if you do - the sooner the better.
But one thing you
do need now is a good sling. I use a CQB SOP 3-point sling for my AR.
Then after you know your weapon you can start exploring rail systems, Aimpoint Comp sights (or Trijicon ACOGs), vertical foregrip assemblies etc ....
The important thing is learning to shoot ... building a ricer doesn't mean you can win the Monaco Grand Prix.
It's the same with guns.
Congrats and keep us updated on your toy!