Standard on all versions really are a match-grade barrel, flat mainspring housing and velocity bump grip protection. Front straps have 25LPI checking and the mainspring housing has 20LPI for ideal grip and user comfort and ease. It's also the client's responsibility to insure which the seller will acknowledge the firearm(s). https://martindlfbn.tblogz.com/indicators-on-ruger-american-45-acp-full-size-10-round-pistol-for-sale-you-should-know-48844286