Evolution Gun Works Gold Cup Trigger w/Tank Treads for 1911 Steel. For maximum durability these Pistol Triggers by Evolution Gun Works use steel rather than the usual cast or polymer to ensure a strong and reliable trigger pull. The frame of this Evolution Gun Works Gold Cup Replacement Trigger is slightly taller to ensure a proper fit in your pistol frame and it is staked and secured in place with patented EGW tank treads. Plus the design of these triggers provides a flat face that gives you the ultimate control of your weapon and the top serrations provide a positive grip that really puts them through their paces. Equip the EGW Gold Cup Staking Mount Trigger to your 1911 pistol for a durable trigger that will deliver premium performance every time. Specifications for Evolution Gun Works Gold Cup Trigger w/ Tank Treads: Manufacturer: Evolution Gun Works Color: Grey/Black Gun Make: 1911 Platform Gun Model: 1911 Additional Features: With Tank Treads Package Contents: Evolution Gun Works Gold Cup Trigger w/ Tank Treads What firearm models does the manufacturer say Evolution Gun Works Gold Cup Trigger w/ Tank Treads is compatible with? The manufacturer suggests that Evolution Gun Works Gold Cup Trigger w/ Tank Treads is compatible with 1911Evolution Gun Works 11305: Gold Cup Trigger With Tank Treads for 1911 Steel