Thanks VA Dinger, I had an M4 upper rigged exactly as this one but liked the velocity the 16" barrel gave over the 14.5,(101fps) handling wise they were the same.
I'm just a hunter, I call coyotes mostly, so I really have no idea on what works for a soldier or LEO. I've just found quality ideas from the HSLD type of guys, that work for me and what I do.
I started off with an extremely accurate Colt 16" HBAR, right now it wears a Leupold MK4 4.5-14 scope in an Armalite mount. It weighs 9# and works very well in it's own right. I also have a pretty much stock Colt 6520 that is simple and fun, it weighs 6# and it works for it's intended purpose.
I guess I tried to combine the good points of both into one gun. I'm very happy with what I ended up with. Attach what you will use to it and be done no matter what it weighs as long as the weight is justified.

