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Durkin Tactical Franklin Armory
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Posted: 4/27/2003 6:19:36 AM EDT
Just wondered why some lowers are stamped 223 and some 5.56 they both shoot the same ammo right?
Link Posted: 4/27/2003 10:29:20 AM EDT
The stamping on the lower is the companies choice,what matters is what the barrel is chambered for. As for "they shoot the same ammo"; [url]www.ammo-oracle.com[/url]
Link Posted: 4/27/2003 10:32:35 AM EDT
The real problem is with the (stupid) [i]barrel[/i] manufacturers, who rarely clearly mark what barrel twist, manufacturer, chamber, etc. on the barrels.  It could be so easy to do so, but.......
Link Posted: 5/4/2003 9:12:58 AM EDT
.556 is a NATO round. You can shoot .223 ammo with a .556 chamber, but you can't shoot .556 in a .223......Is that clear as mud or what?
Link Posted: 5/5/2003 12:27:35 AM EDT
Not Totally clear, e.g. Ruger Mini 14's are marked .223 on the receivers but they are actually Chambered in 5.56 .

A lot of guns that are marked .223 can actually Shoot 5.56 ammo.
Some Oly's are Marked .223 but they can  take 5.56.

There are no hard or fast Rules really , but its important to know what youve got.
Link Posted: 5/5/2003 6:58:33 PM EDT
And of course some, like DPMS and Bushmaster, mark the lowers 5.56-.223[:D]
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