Been 5.56 for years. Stepped up to 6.8 with builds that get the job done and then some. Marine Corps trained and hard to find shooters that compare. No brag, just fact. I'm ready to put my build experience to the test with an AR10 that will hopefully meet my expectations. Any weapon that does not produce under 1 inch groups at 100 yards is not acceptable to me. So, let's run with this and see what folks on this site can do to make this AR 10 a reality. Thanks, looking forward to any suggestions and input.