The G&G GR4 100Y Plastic Blowback AEG is a modular and compact CQB airsoft carbine, perfect for fast paced room clearing and cornering in confined spaces such as indoor CQB battle fields. This rifle features a polymer body and rail system, keeping it light weight and extremely durable. The LE-style stock allows players of all sizes to use this weapon comfortably, and can easily be adjusted for long range or short range battles. What really sets the 100Y apart from the other budget friendly rifles in the G&G arsenal, is the innovative outer barrel/RIS/battery storage design. Just in front of the removable front sight is a small latch on the RIS rail unit. Once this latch has been opened, the entire outer barrel/ RIS system can be slid off of the front of the gun, allowing the user to tuck the battery inside of the RIS unit. This eliminates the worry of a bulky PEQ box or having to rewire the gun to the rear for better battery placement. A seamless metal top optics rail and modular nylon fiber rail system not only ensures the gun to continue the lightweight theme, but allows you to add and customize your favorite accessories to anything you may want! The GR4 is equipped with rugged Nylon Fiber reinforced polymer upper and lower receivers, which decreases overall weight of the gun while maintaining structural integrity. The GR4 features over 30 inches of combined rail space giving you the freedom to add a grip,sight, and whatever else you may need on your way into battle. The gun features 2 removable iron sights at each end, really allowing you to customize this weapon anyway you see fit. G&G went all out on this weapon, while still keeping it affordable. Featuring a reinforced gearbox build and enhanced internals, you are given an extremely high rate of fire right out of the box! The G&G pneumatic blowback gearbox uses air compression to drive the mock bolt back and forth, reducing stress on the gearbox and improving shot consistency . If you want something with unique aesthetics, a lightweight design, and rugged construction the G&G GR4 100Y Blowback AEG is the perfect choice for you!