The MOE (Magpul Original Equipment) Enhanced Trigger Guard is a polymer drop-in replacement for the AR15 / M4 weapons platform. This upgraded trigger guard is easily installed without the use of specialized tools, using three set screws to secure it to the lower receiver. This eliminates the need to install a roll pin with a hammer and punch and greatly reduces the chance of any damage to the receiver due to improper installation or out-of-spec receivers. The Enhanced Trigger Guard has an ergonomic and enlarged design to accommodate use with gloves or when shooting in cold environments and fills the annoying "gap" at the rear of the standard trigger guard. Also works well with most 7.62x51 AR platforms, but some custom fitting may be required. Specifications for Magpul Industries MOE Enhanced Trigger Guard Polymer for AR-15/M4: Manufacturer: Magpul Industries Gun Make: AR Platform Gun Model: M4, AR-15 Fabric/Material: Polymer Condition: New Package Contents: Magpul Industries MOE Enhanced Trigger Guard Polymer for AR-15/M4 What firearm models does the manufacturer say Magpul Industries MOE Enhanced Trigger Guard Polymer for AR-15/M4 is compatible with? The manufacturer says that Magpul Industries MOE Enhanced Trigger Guard Polymer for AR-15/M4 is compatible with AR-15, M4