Keep Your Weapon Secure The GORUCK Retention Caddy 2 Piece Set uses two Hook-and-Loop (Velcro-style) interfaces. Use one set per rifle or pistol. Once your gear is locked in, it doesn&';t move until you move it. Infinite Customization: The Hook-and-Loop panels attach securely with Velcro to the internal Buffalo Fuzz liner of GORUCK Rifle Cases, allowing you to secure your weapons exactly where you want them.