So for example, if I had a lower the was marked for .223, could I stick a 6.5 Grendel upper on that and would it matter? Also are the lowers different for different calibers? I am most certain that the lowers for say a .308 are different sized than a .223 lower but what about 6.8spc and 6.5 Grendel?
I have done some searching on this and I can't come up with the clear cut answers I am seeking. I also read over this thread http://www.brianenos...showtopic=78810 but it didn't shed too much light for me on the subject.
Thanks for any help on this.
Edited by mjohns930, 13 February 2009 - 08:11 AM.