GG&G Vertical Grip 1169 features a waterproof interior compartment that will accomodate a spare AR15 / M16 bolt. The GG&G Tactical Foregrip for AR-15 will add several tactical advantages to your arsenal, from diminishing muzzle climb during burst-fire sequences to simply offering a more comfortable shooting stance. Through joint kinematics manufacturing, GG&G now offers this Vertical Foregrip at a greatly reduced price while still maintaining the quality. The GG&G AR15 Vertical Foregrip provides far more than the standard vertical grips: it is made of the highest quality materials, and features and a core with a waterproof compartment to store batteries and other small items. The interior of the "O" ring sealed waterproof compartment has been re-configured to securely hold the bolt in place - no rattles here! Without the spare bolt stored, the waterproof compartment is large enough to securely hold two AA batteries and or two CR123 batteries. Three N type batteries, firing pins, ejectors, extractors or other small replacement parts for your weapon system can be stored in the compartment but the user needs to pack additional material, so as to eliminate rattling. The waterproof compartment of the GG&G Foreward Vertical Grip has been re-designed with an ergonomic-no snag tri-grip feature, for access without having to resort to tools or coins. Unlike other forward hand grips in the marketplace which are molded or injected plastic, all parts of the GG&G Vertical Foregrip are CNC machined from solid black Acetal cold polymer for durability and low heat absorption. No special tools are needed for installation or adjustment in the field. This rugged vertical foregrip is 4.5" in length, 1.250" in diameter and only weighs 2.4 ounces. A separate "O" ring seals the threaded core from the combat environment. The GG&G Vertical Hand Grip is guaranteed to work in some of the world's toughest environments and situations. The GG&G Vertical Foregrip for the AR-15 and M-16 is destined to become a valued tactical accessory in military, law enforcement and civilian arenas. Specifications for G&GG 1169 Vertical Grip: Material: Acetal cold polymer Color: black Length: 4.5" Diameter: 1.250" Weight: 2.4 oz. Gun Model: AR15 Features of GG&G Vertical Fore Grip: "No tools needed" Tri-Grip Waterproof Cap And Compartment Compartent Holds Spare Bolt, etc. Alignment window to aid in installation Package Contents: GG&G AR15 Vertical Grip 1169