Well, ActionBob, I should have done a bit of research -- I could have answered my own questions. My apologies. It appears Ruger supplies the Guide Gun with three muzzle attachment options: 1) the brake, 2) a muzzle weight (similar to the CR body of the Browning A-bolt) with no brake, and a simple cap to protect the muzzle threads. Adjustable LOP through stock spacers, and a reportedly better trigger than the original Alaskan. Also a bit heavier overall than the Alaskan, a good thing in such a rifle. And best of all it's available in a left-handed model, which is great for me, because, to paraphrase Inigo Montoya from the Princess Bride movie (a modern classic), "I am not right-handed!" . I'll have to look into this a bit more. Many Thanks! Anyone else, feel free to chime in.
Tony, so you are a lefty. Me too, except I'm right eye dominate and have shot right handed all my life. However, you being a true lefty are in luck. I looked on Gunbroker and they are several left handed 375 Rugers. There's are three listed w/ 20 inch, stainless, laminated Hawkeye in LH action: The first one listed is the best deal listed at $730.