I recently purchased my first ar15. I went with the Sig M400 Enhanced.
Anyway, the specs on the site noted it was chambered for .223. I started reading about 5.56 and .223 and found SAAMI said it was unsafe to fire 5.56 in a .223 rifle. I also found a couple of sites that said some commercial .223 ar15's will allow you to fire 5.56 safely.
Anyway, when taking my rifle apart for its cleaning, I noticed that both the upper and lower were stamped with "5.56 nato".
So with that stamp, I would assume it can fire 5.56 but I DID buy the .223 version.. hoping someone could help shed a little light on it so I can be sure and safe. Thanks!
Anyway, the specs on the site noted it was chambered for .223. I started reading about 5.56 and .223 and found SAAMI said it was unsafe to fire 5.56 in a .223 rifle. I also found a couple of sites that said some commercial .223 ar15's will allow you to fire 5.56 safely.
Anyway, when taking my rifle apart for its cleaning, I noticed that both the upper and lower were stamped with "5.56 nato".
So with that stamp, I would assume it can fire 5.56 but I DID buy the .223 version.. hoping someone could help shed a little light on it so I can be sure and safe. Thanks!