Ellis, Springfield trimmed back the Edge’s weight through a unique lower-receiver design, removing material around the mag well to make it feather light. The Edge has a single-stage modular match trigger that is Melonite treated, ensuring it has a crisper and cleaner brake compared to the standard Saint. With the slightly up scaled Brace, the Edge is an upgraded version of the standard Saint Pistol.

Ellis, the Edge model is mostly centered around being lightweight, it has a lighter lower receiver and lighter profile barrel. They also have different adjustable braces and slightly different handguards. A bit easier to see in the pictures from the SA site: springfield-armory.com/products/saint-ar-15-pistol-5-56/# springfield-armory.com/products/saint-edge-ar-15-pistol-5-56/