New and just learning. Never even posted anything before ( please be gentle with me guys ! LOL)Just bought a Aero Precision 12.5" 308 barrel upper with a 12" ATLAS R Handguard. Was going to run a suppressor on this but now realize the threads are inside the handguard and the hangguard is 1.5" diameter, most suppressors are 1.5" so it looks like I can't even get a direct thread to run on this. If I understand correctly you don't want the suppressor to ever touch the handguard or even to close due to barrel harmonics and accuracy issues. Not sure cutting the handguard off is an option, as it looks like I would have to cut it back about 3-4" due to the design of handguard. As I said I'm new to all this and just learning so any help would be greatly appreciated thanks.