I can't say anything on the BlackFeather. But I do own an EBR. It requires work to have an M305 fit properly in the stock. It was such a bad fit, that it actually bent my trigger guard because the receiver sat way higher than with the original stock. As well, the EBR chassis was machined exactly the same on both sides, inside the chassis. Which sucks because the retaining pin holding the recoil spring in place, walks out on its own. So you go to release the magazine and your spring flies into the magazine well and its a ##### to get it back in place without taking the whole gun apart. That's the other drawback with the chassis. When you want to take it apart, you have to take the whole rifle apart, because the OpRod guide bolts to the chassis, so its not just simply pulling the trigger and removing the receiver. And lastly, its heavy as hell. Makes it a ##### to try shoot off hand. As well, if you're going to mount a scope to it, go with an A.R.M.S. #18 style scope mount. This way when you do have to take the rifle apart, at least the scope is staying on the receiver. With other styles of mounts, half the mount attaches to the forearm of the stock. SO if you want to do anything to it, you have to remove the scope first. Overall though, its a beautiful looking stock. It's just a matter of how much you're willing to give up for looks. I'm personally changing my stock. I'm going with a BlackFeather Stock with Magpul PRS buttstock. I had to machine out quite a bit from my EBR Stock for the rifle to fit properly in it. I figured out what was wrong with it when I did a function check. The trigger wouldn't lock back when the action was cycled. So I had to machine out some parts on the top of the chassis and some in the trigger area. If you want pics of what I mean I can send you some. Final decision will be entirely up to you.