Close grasshopper. They were that size until 2009. After that all are threaded 1/2" x 24, except the Republic of Kalafornia 556's which don't have removable flash suppressors.
Close grasshopper. They were that size until 2009. After that all are threaded 1/2" x 24, except the Republic of Kalafornia 556's which don't have removable flash suppressors.
For sure 1/2x28 thread. Just screwed on my Black River Tactical compensator and and it fits great. Plan on trying it in the morning, weather permitting.