Are you considering to start a .308 rifle build, if so, we need to start with the .308 lower receiver.
The .308 rifle platform is not uniform in the same way the AR-15 platform is across manufacturers – an understanding of .308 rifle parts compatibility is key.
If you want to build out an awesome .308 rifle, one of the first choices you will need to make is what type of .308 lower you are going to use to start your .308 rifle build.
Your choices will fall into two broad categories, radius cut at the buffer tube or angular cut at the buffer tube:
There are many popular manufactures who produce a .308 rifle with a radius at the buffer tube: DPMS,