AmeriGlo Serrated Notch Classic Rear Pistol Sights for Glock Black. The unique serrated notch design not only lends to its quick acquisition but also increases visibility of your front sight post. This serrated shape increases visibility of your rear notch sight which is especially critical when firing with shorts. Additionally the serrations on the rear sight allow for greater visibility of your front sight which prevents over-brightness that can occur with too-bright front sights. This also reduces the possibility of accidentally shooting your sights on something bright which can decrease target acquisition. Overall the sight provides a sharper more certain sight picture that generates faster front sight acquisition. If you're looking for a serrated rear sight that is not too deep AmeriGlo has got you covered. Specifications for AmeriGlo Serrated Notch Classic Rear Pistol Sights for Glock: Manufacturer: AmeriGlo Gun Make: Glock Color: Black Rear Sight Color: Black Gun Type: Pistol Rear Blade Height: 0.256 in Features of AmeriGlo Serrated Notch Classic Rear Pistol Sights for Glock Glock: All except 42/43/48 variants. Package Contents: AmeriGlo Serrated Notch Classic Rear Pistol Sights for Glock AmeriGlo GL-400LL: Serrated Notch Classic Rear Pistol Sights for Glock Black