Phase 5 Weapon Systems Inc Brass Pistol Grips Hex Pattern Brass. Package Contents: Phase 5 Weapon Systems Inc Brass 1911 Pistol Grips What firearm models does the manufacturer say Phase 5 Weapon Systems Inc Brass 1911 Pistol Grips is compatible with? The manufacturer suggests that Phase 5 Weapon Systems Inc Brass 1911 Pistol Grips is compatible with 1911Phase 5 Weapon Systems Inc 1911Grip-BrassHex: Brass 1911 Pistol Grips Hex Pattern Brass