I'm looking to get something to bridge the gap between my 20" AR10 and 16" carbine. This rifle will probably be equipped with either a TA31 or compact ACOG, and a Magpul stock.
I don't think I want a 20" barrel on a .223 when I already have the AR10, so I'm left with the choices of either a 16" (mid length) or 18". I will be using 75 grain rounds, so I need at least a 1:8 twist
For the 16" option, I could use one of the new chrome-lined 1:7 mids that are becoming available.
I seem to have missed the SPR craze, so I don't really know much about the available types of 18" barrels. Are any of them chrome lined? Where can I see some of the available options?
What do you guys think about this choice? What does an 18" barrel really offer over a 16"?