Not sure if Rock River even sells through dealers, can't tell from their website. Thought I would check here first though.

I can/have ordered from Rock River Arms. Don't know about a stocking dealer. It takes me about 2-3wks to get a gun as I believe they built them up as they get ordered in what ever particular configuration the customer wants.

Provide me with the configuration you are looking for and I will email you off a price and estimate of delivery time.

Any FFL with a copy on file with Rock River can purchase direct from them.

Looking at their Elite LE Tactical CAR A4.  Would like to upgrade to an 18" barrel if possible.  They show on their website this unit is chambered for 223/5.56 NATO.  Wondering what the actual chamber is closer to 223 or 5.56?  My understanding is 223 is tighter and you are taking chances shooting 5.56 ammo.  Chrome moly barrel and 1:9 twist is okay.  Rest of rifle has options I want.