This 1911 holster will fit a Rock Island FS 10mm like a glove. The mag release is covered, the Ambi safeties are covered and the loops on the back can handle a 1 3/4 inch belt. The locking retention keeps that big gun in the holster even upside down and shaken. The holster shape has a wing design that pulls the gun in tight to the body. In short, these guys have made a really well designed holster.
Absolute perfect from shipping to the personalization and quality of the product. The holster fit is dead on.