Bob!

Why on earth do you need the thread size for the Encore breechplug?

Again Bob! Are you thinking of/ or manufacturing an aftermarket plug for the Encore?

Make sure you know all the laws in regards to copyrights, reproductions, product changes... etc.

Another fella a while back tried to produce his own Hornet conversion for the Encore. Last I heard, he may be awaiting a court appearance for doing so because PR Bullet Co has patent rights for the aftermarket product.

Talk to a lawyer or two Bob... then go forward from there! Don't try to sell something that's illegal (or) in violation rights until you are convinced you won't be sued.