The TROY Modular Combat Grip delivers outstanding ergonomics, unmatched durability, and modular versatility in a lightweight design built to complement any M-LOK rail system. Whether you're on the range or in the field, it's engineered to provide a confident, secure grip when it matters most. Modular Grip converts easily into two sizes: 4 5/8" when completely assembled & 3 1/4" when in short mode. FeaturesThree part modular designFits M-Lok Rail systemsHardened aircraft aluminum