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It needs to be cut out some at the front of the box at the half moon cutout. It was higher than the feed ramp. Also, the follower seemed to short. I ended up with a Rem 223 factory set up and it is working fine. I just didn't take time to work with it after I found the OEM parts.Why didn't it work for you
I'm pretty sure the ADL is taller, but wait for someone else to confirm.Do you know if an ADL box magazine and a BDL box magazine are interchangeable?