Originally Posted by PCK_4xCustoms
Considered a 7.62x39 chambered upper?
Different mags, but can utilize your preexisting ar15 lower...
Along with the AK round, there are a shit ton of other calibers that can work with a standard milspec lower. Not to mention most of the accesories and furniture works across the board too.
While not as heavy a hitter as a .308, lots of these calibers can make excellent deer hunting or varmint hunting rounds as well.