We recently showed you the upper receiver from the Bentwood Gunsmithing exclusive Battle Arms Development OIP (Ounces is Pounds) carbine. Now we have a sneak peak at the lower receiver. The renderings below give you a pretty solid idea of what the final product will look like though the faceted areas shown will actually be smooth curves.
Again, these will be available exclusively through Bentwood Gunsmithing as part of a complete carbine but you can expect to find the ideas explored here incorporated into upcoming Battle Arms Development products.