Powerclaw Superior Latching System: Secure and reliable closure Indestructible and Lightweight NK-7 Resin: Durability without the bulk Water Resistant and Dustproof IP65 Rated: Protection against the elements The NANUK 925 4 Up Pistol Case is compatible with most guns with a barrel up to 5. Built to organize, protect, carry and survive tough conditions, the NANUK 925 waterproof hard case is impenetrable and indestructible with a lightweight tough NK-7 resin shell and PowerClaw superior latching system. With NANUKs exclusive locking and latching system, your case stays shut and secured until you are ready to open it.