by Shooting Illustrated Staff posted on April 21, 2011 Optics Support NRA Shooting Illustrated DONATE XS Sights are excellent aftermarket additions to any defensive firearm. In this article handgun sights, iron sights, rifle sights, shotgun sights, Tactical, tritium, XS Sight Systems Related Stories XS Sight Systems Using Iron Sights on an AR-15 Gallery First Look: XS Sights R3D 2.0 Tritium Night Sights for 1911 Pistols First Look: XS Sights R3D 2.0 Minimalist Tritium Night Sights First Look: XS Sights For Heckler & Koch Pistols Most Popular Hickok’s Mistake Pushing The Limits of Smaller Guns Review: Colt Viper Revolver Review: Sarsilmaz SAR .357 Magnum SR Revolver Straight Talk: Making a Point Range Review: Gunsite Hog Hammer 1911