.223 vs 5.56 NATO

[HunterCO]

my barrel has no such marking :cry:

Contact RRA and ask I would bet it is chambered for 5.56 but no harm in asking.

Let us all know what comes of it.

[The1andOnlyKC]

Wow I am surprised RRA does not mark their bbls. That kinda sucks because when I goto a gun show I wont buy a AR with a non marked BBL because of all the CRAP people try to pass off.


I am pretty sure all RRA are 5.56 NATO but a quick e-mail of phone call sure will save you alot of time and hassle down the road if it is not.

[2ndChildhood]

My RRA is only a couple months old and I got it off the shelf from Jensen.
It's an off-the-shelf standard model.
Mine is not marked on the barrel either, only on the lower.
Here's a page from the catalog that came in the box - it gives the caliber as 223/5.56 NATO.
2C

[Hoser]

Some RR uppers have Wylde chambers. I dont think you will find them anywhere but "match" uppers. I have no idea if they are marked or not.

[mr_will]

my rra is a wylde chamber
i think all rra rifles are 5.56 and their SS barrels are wylde