Mission First Tactical Engage AR15/M16 Pistol Grip - Scorched Dark Earth. The interchangeable grip straps Mission First Tactical included provide a custom fit for any sized hand. Secure watertight storage compartment provides storage for small items and rifle accessories and the customizable foam storage block with quick access tab diminishes rattle. With MFT weapon accessories you can expect nothing less than the best performance in the most dangerous environments. Specifications for MFT Engage AR15/M16 Pistol Grip with 3 sets of interchangeable front and back straps - Black - EPGI16: Manufacturer: Mission First Tactical Finish: Matte Gun Model: Heckler & Koch HK416 M16 M4 AR-15 Fabric/Material: Polymer Condition: New Features of MFTEngage AR-15/M-16 Pistol Grip w/ Inter changeable Straps: Designed for M16/M4/AR15/HK416 Any combination of interchangeable backstraps and finger swells Provides custom fit for any sized hand Covers the receiver gaps that cause discomfort during sustained usage Secure watertight storage compartment Customizable foam storage block with quick access tab diminishes rattle Package Contents: MFT Engage AR15/M16 Pistol Grip with 3 sets of interchangeable front and back straps - Black - EPGI16 What firearm models does the manufacturer say MFT Engage AR15/M16 Pistol Grip with 3 sets of interchangeable front and back straps - Black - EPGI16 is compatible with? The manufacturer says that MFT Engage AR15/M16 Pistol Grip with 3 sets of interchangeable front and back straps - Black - EPGI16 is compatible with AR-15 M4 M16 Heckler & Koch HK416Mission First Tactical EPGI16-SDE: Engage AR15/M16 Pistol Grip - Scorched Dark Earth EPGI16SDE