If you can find one, the New Designz breech might serve you better. If you can find a lucky body, those are cocker thread.
We have nothing to fear but fear itself. Apart from pain. And maybe humiliation and obviously death. And failure. But apart from fear, pain and humiliation, failure and the unknown and death we have nothing to fear but fear itself. Who’s with me? -Arnold J. Rimmer VM-68 Magnum