Originally Posted by dukie
the round 12 gram holders that an airsmith on here was making for/with someone else. I think they had a hole in the middle to fit over a stock or something and I believe 6 holes on the outside. I think the thread was in the dealer section
I stuck an evil ball through it and it fits snugly so I'd say it's bored at about a .675-.680. There isn't a hole in the middle.