Optimized feed ramp angle for reduced "Speed Reload" split times Precision CNC Machined for a perfect fit No added print signature for EDC Eliminate debris from entering into your pistol through the frame cavity Significant added weight to reduce felt recoil for competitive shooters and training professionals - Speed Feed Pro Brass Model Approved for use within the USPSA by the Rules Committee! Speed Feed Pro – Brass has two models: G19-Compatible with all Gen5 Compact GLOCK Frames - G19, G23, G32, G38– weight 1.8 oz G17-Compatible with all Gen5  Full size GLOCK Frames- G17, G17L, G22 , G24, G31, G34, G35, G45 sized frames – weight 2.6 oz