I have a midlength Troy MRF-DI rail that won't fit on a new build and I'm trying to figure out if its the rail or the barrel assembly thats the cause.

Does anyone have a midlength upper handy that could take a quick measurement for me? I need to know what the length should be from the face of the barrelnut (facing towards the FSB) to the edge of the handguard cap.

Thanks!