BCA put the uppers on for $264, which is a lot less than a RAR, so that made it a relatively cheap experiment. I notice Hornady now has a 170gr bullet for it.
I'm wondering if a typical 5.56 lower might benefit from a heavier buffer before mounting this upper?
That's the way I went & just received my BCA upper. I picked up some of the Hornady 170gr loads for it too. Haven't tested for accuracy but a quick 10 round "function test" went without a hitch.
I'm no AR expert by any means, but if it uses the same bolt group and runs at the same pressure as 5.56, it would seem the same buffer would be fine?
I get it some folks are incensed with not being able to use .223 cases, but with readily available and relatively inexpensive brass and FMJ (<$10) plinking ammo, I don't see it as a huge stumbling block. In the big picture of things, it's a very small percentage of people who buy into the .350 that such things matter.
