Madbull Daniel Defense 7" MFR & Silencer

[gzuk1984]

Hi Guys,

Can anyone tell me silencer that would fit inside a madbull daniel defense mfr handguard? I cant seem to find any specification on the internal diameter of the rail. The outer barrel is CW threaded. The silencer would need to go inside the rail maybe 3" or so and ideally would fit nearly flush. Has anyone got any builds with this that can advise?