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Yes, these barrels are threaded at the muzzle and can accept a suppressor. The muzzle threads are 5/8"x24TPI pitch.
Yes, all ‘threaded’ barrels are, meaning there are threads on the outside of the end of the barrel. Just tell your suppressor retailer that the barrel you are buying (this one) is 5/8x24 threaded and 30 calibre. When it comes down to suppressors there are many options but that will help, luckily its probably one of the most common. If its your first suppressor consider getting one you could fire 9mm through as well (slightest bigger diameter but hardly noticeable) and you could use it on all kinds of stuff, or even better 308/7.62x39