We have the M9's no need for the rail, putting something there give an advantage to the bad guy. The holster is large enough. Protects the mouth and does have enough room for the A-1 I do believe. Since they are abouth the same size. The way we bend, break, and use out who knows, maybe the A1 will be ours in the future. Hell we love the weapon, a lot lighter than the Kimber. Personally, I prefer the Steyr over the Glock or S&W, fits my big paw a lot better.
P.S. Why not order it, you know the saying "if it don't fit you must acquit" :?: