Yes, but RDB has super long threads since it uses a lock nut to secure the stock A2 flash hider, (this is also a pain to remove since they have the hulk tighten the lock nut apparently). I put mine on, but the threads peak into the brake openings, so I'll prob have to get some lock nuts along with crush washer to set the appropriate depth. It WILL NOT fit with the stock handguard though without some modification to it. You'll with have to drill or file out the material from the stock handguard to get it to fit.
Speaking of which, you guys wouldn't happen to know if (
https://truenortharms.com/ar15_default_store_view/jam-nut-for-muzzle-device-hex.html) will fit in the rear opening of the linear comp?