I just got a 9.0 Daniel Defense M4 rail. I got it as a special order from Brownells.
The little keeper pins that keep the rail from spinning will not fit in four of the holes in the barrel nut. I don't think this will be a problem unless the nut lines up in a way where one of those holes stops in the spot where the keeper pin needs to be.
Is this nut out of spec and should I call DD to get another one, or is it supposed to be like this? I have not tried to install the rail yet. Only took it out of the box and took it apart to check it out.
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