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Posted: 10/6/2004 8:42:33 AM EST
When I was looking at the RRA website, the uppers are listed as chamber in .223/5.56 NATO. Well, which is it? I've ordered the Tactical Entry upper so I'm confused as to which it is.

Link Posted: 10/6/2004 8:48:16 AM EST
it is a new 223/556 chaber, also will fire 50 cal, and 308
Link Posted: 10/6/2004 8:52:33 AM EST

Originally Posted By avengeusa:
it is a new 223/556 chaber, also will fire 50 cal, and 308



lol!

... the 223/556 chamber wil shoot both rounds... a 223 chamber can't shoot a 556... but a 556 can shoot both... so its really a 556
Link Posted: 10/6/2004 8:53:35 AM EST
Standard RRA barrels are chambered for 5.56mm NATO but also safe to fire .223.

The varmint barrels are chambered for .223 wylde.

The progression from tightest to loosest:

.223 rem
5.56 Match (some)
.223 wylde
5.56 NATO
Link Posted: 10/6/2004 8:55:18 AM EST

Originally Posted By avengeusa:
it is a new 223/556 chaber, also will fire 50 cal, and 308



Link Posted: 10/6/2004 9:20:27 AM EST
i like my chamber sloppy!
Link Posted: 10/8/2004 2:48:47 PM EST
When I asked about 2 years ago RRA tech support told me that all 20" barrels are .223 Wylde and all 16" (including varmint and SS bbls) are 5.56 NATO chambers. The ".223/5.56" in the catalog probably means that the guy making up the catalog doesn't have a clue that they're not the same.
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