'Stripes' on MCB designed a 1-piece feed several years ago, which 'Lindsay' then took over production of. We bought a batch to sell a few years ago, and finally got around to actually anodizing them!
These were designed to raise the feed up by a quarter inch, providing proper clearance for the ball gate cap when used with a dropout valve body, or to use an AR stock with our CAR-15 valve adapter. They are also true '1-piece' feeds, as they are bored out from solid bar stock, not tubing, so there is no front 'plug'. The anodizing is a perfect match for standard 'CCI black'.
We only have 10 of them, and I'm keeping at least one for myself!