Lowers other than 556

[Sleepy1988]

Whats so special about that are advertised as being for other calibers, such as a 6.8 SPC lower? You can buy a 6.8 upper and just put it on a 556 lower right?

[ldivinag]

yup...

nothing special anymore these days.

edit: unless you need a bigger action like for .306 or 30.06 ones...