Troy Alpha rail install issue

[Dr. Lee]

Got the rail butted up against the receiver face and when I tighten up the screws, the handguard pulls away leaving a gap of about .020-.030". I tried clamping a removeable carry handle to bridge the receiver and the top rail on the handguard. I tightened the screws, released the carry handle and there was still a gap, only about .010".
Anyone have this happen installing a Troy alpha ?

Thanks,
Dr.