RdKill said:
Same can be said for a carry handle model too. Set up different scopes/red dots, halos or whatever on separate carry handle mounts and with the twist of a knob you can change them out. With good mounts (Dednutz-Game Reaper is a great mount for the money), they retain zero pretty well.
Carry handles aren't anywhere near as versatile as flattops. Firs of all, any optic in a carry handle is going to be mounted at least 3" over the bore. If you get a cheekpiece where you can use the optic comfortably, then you can't use the iron sights without removing the cheekpiece. And while
some carry handle mounts retain zero "pretty well", there are many choices of flattop mounts that will return to zero so reliably you can't tell the difference between a normal five-shot group and a five-shot group where the mount was removed and reattached after every shot.
Not to mention that with a flattop, you have a huge range of iron sights as well. I can have an HK drum rear aperture sight for my AR. I can have M14 NM rear sights that attach to my AR. I can even go open sights if I want to. Plus I can change it all back to the way it was with a twist of an allen wrench. Heck, I can even have a carry handle on a flattop.
Finally, with a flattop I can use
multiple optics. I can use a magnifier with a red dot, or a PVS-14 with a red dot. I can use a scope with an offset red dot. That isn't something you can do with a carry handle.
Short of nostalgia or personal desire, there is pretty much zero practical reason to have a fixed carry handle on an AR.
tirod said:
A 16" carbine won't shoot minute of prairie dog past 100 yards. Not good. You need a 20" stainless precision barrel, quality bolt, A3 flattop upper, 3X9 quality scope, fixed stock furniture with a simple free float tube to mount a bipod, and quality target trigger.
I have to disagree with tirod here. I've got a 16" carbine that is quite capable of ruining a prairie dog's day out to 300m and still do heavy duty carbine work. However, he is right in the overall point I think he was trying to make, which is that a dedicated upper will always outperform a multi-purpose upper. A dedicated 16" home-defense upper is going to be better than my 16" carbine in that role. A dedicated 20" prairie dog upper is going to be better than my 16" carbine in that role. The flip side of that is I know how to use that one rifle in a variety of situations and I'm very comfortable and confident with that rifle.
Having said that, you need to think about what compromises you want to make and where if you are going to try to achieve both purposes with a single rifle. Is accuracy more important than reliability? Is having a true 1x optic for home defense more important than being able to see a prairie dog well at a distance? What are the likely ranges I need to engage each target type?
And one other thing, while my rifle isn't as good as a dedicated upper, it cost a lot of money. I could have easily built two dedicated uppers for what I've got in the one upper that doesn't do either role as well.