Black rain ord. mlok handguard - Black Rain Ordnance Mlok Handguard

The Black Rain Ord Mlok Handguard is of great quality. Only downside it didn’t come in its original packaging and the barrel nut doesn’t fit. Did some research and found out the barrel nut isn’t the original part. It must have been a return!! Reached out to OpticsPlanet about the problem and they said to reach out to the manufacturer. Reached out to Black Rain Ord and no reply. FRUSTRATED!
A seller that and a manufacturer that doesn’t care.