AR15 Upper

We often get asked which upper matches the best with our receivers.? Any mil-spec upper will work, that is the beauty of the platform … but which one fits and matches the best? The answer is this one. This is the new version of our upper receiver, in production now and expected to be available in June.? As mentioned it matches any of our lower receivers perfectly, but it also matches the lines of our handguards perfectly as well. This receiver is meant for?.223, 5.56, 300 BLK and 6.5 Grendel calibers.? Port opening is not large enough for 450 Bushmaster, 458 SOCOM or 50 Beowulf.