Can anyone tell me what kind of sights the Para Ordnance P14-40 uses? I want to put night sights on it, but I am confused with all the choices in fittings. This is my first 1911 style gun and I have no idea what sights to use. Also, does anyone know what recoil spring fits the thing? The slide is a hair longer than a commander, and it does't have a guide-rod. Wolff lists the spring as the same used in Colt commander pistols, is this right? Any help would be greatly appreciated.