S&J Hardware Bayonet Lug for 870 on a 590?

[Tehoke01]

Does anyone know if the Remington 870 Bayonet Lug Mount (1/2 mount) by S & J Hardware will fit properly on a Mossberg 590 (I have the 20" 9-shot Mariner)?

Is the height between the barrel and mag tube the same on a Remington 870 as on a Mossberg 590?

 

[Cyanide Ride]

I recall posing this question to Simon before and he said it should fit with no issues.

But if you would like to wait for him to chime in