Hi i was at the range shooting my Rock Island Armory Goverment Full Size and i noticed when i was home. That the front sight had broken off which is good because now it will be easier to install some long awaited. Night Sights the only thing is i hear that the the RIA GI Sights are different from that of a Colt for example. Otherwise i would just get online and buy Night Sights that Fit a Colt Goverment Full Size. Then install them on my RIA 1911 but it turns out the size or something is different. I forgot what size and/or angle he said they have to be. ( It just seems weird that a Colt GI 70 series sight size and angle would be different then my RIA GI 70 Series ) Personally i just think the salesman wanted me to buy his sights at his shop which were a little over $200 Then $75 for installation. No Thank you i will buy them and install them myself. I would like to have a 3 dot glow in the dark platform any brand you would recommend?????? The pistol is the Rock Island Armory M1911-A1FS Goverment 70 Series What is the Sight Size and angle?????? Thanks for your helpful answers in advance.