It's aluminum, fits a golf ball perfectly and threads onto standard AR15 barrel threads.
By the way, what are the threads on AR barrels? It's 1/2-24 UNF, right? I haven't actually threaded yet as I couldn't remember the thread size. I'm also going to cut some grooves in it to make it easier to turn onto the barrel. Basically, it's not done.
By the way, what are the threads on AR barrels? It's 1/2-24 UNF, right? I haven't actually threaded yet as I couldn't remember the thread size. I'm also going to cut some grooves in it to make it easier to turn onto the barrel. Basically, it's not done.





















































