We all know the SIG USA made 556 sucks for many reasons.
Well what would happen if Swiss Arms decided to make a 55x carbine that took AR15 mags, and had an ambi mag release. Wouldn't that kick ass!!!
Now this is what the 556 really should have been.
http://www.youtube.com/watch?v=asfgR...layer_embedded
http://www.thefirearmblog.com/blog/2...553-us-at-iwa/
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