gentlemen (or ladies) I am going to put a muzzle brake on my Remington VLS in stainless. I want to use the Shrewd Varmint brake and it comes in three different thread sizes, 1/2-28, 9/16-24, and 5/8-24. I would like to keep the mounted brake as close to the contour of barrel as possible. Which size should I order? Thanks.