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Mobuck · August 8, 2013, 08:39 PM

What do you expect the gun to do for you? How do you plan to use it? A 16" carbine is lighter and handier for a general purpose gun. The 20" will give about 200fps more velocity and is easier to hold steady.
I have one S&W AR (a 5.45x39) which has been generally satisfactory. It was sent back for adjustment but this was an ammo related problem. I'm not sure but don't think I have a Rock River. Resale wise, the S&W might hold value slightly better. Unless you're planning to engage in some of the high volume shooting games, most any name brand AR will last you a long time.
Most of my AR type rifles are home assembled lowers with various manufacture uppers. I deem them to be good enough for whatever use I have for them.

August 8, 2013, 08:39 PM	#2
Mobuck Junior member Join Date: February 2, 2010 Posts: 6,846	What do you expect the gun to do for you? How do you plan to use it? A 16" carbine is lighter and handier for a general purpose gun. The 20" will give about 200fps more velocity and is easier to hold steady. I have one S&W AR (a 5.45x39) which has been generally satisfactory. It was sent back for adjustment but this was an ammo related problem. I'm not sure but don't think I have a Rock River. Resale wise, the S&W might hold value slightly better. Unless you're planning to engage in some of the high volume shooting games, most any name brand AR will last you a long time. Most of my AR type rifles are home assembled lowers with various manufacture uppers. I deem them to be good enough for whatever use I have for them.