1 year warranty through Elite Force The H&K M27 IAR (Infantry Automatic Rifle) is based on the design of the H&K 416 Assault Rifle and is used by the United States Marine Corps. This weapon is intended to replace a portion of the M249s currently in use by automatic riflemen in infantry, light armored, and reconnaissance battalions. Compared to the HK 416 the M27 has a longer barrel and longer RIS. However, it is still a light weight rifle compared to the M249, making it easier to maneuver with. This airsoft version of the M27 IAR from Elite force is OEM by VFC. VFC is well known for manufacturing some of the highest quality, most reliable airsoft guns on the market. Elite Force is so confident in this product that they back it with a 1-year warranty. The gun itself features full metal construction, a full length 11" RIS (Rail Interface System), and retractable crane stock. Everything on the gun is extremely solid. There is virtually no wobble on any of the moving parts, the magazine clicks into place nicely, and the adjustable length stock is also rock solid. The battery (sold separately) is contained within the stock. The butt-plate on the stock twists off very easily for quick access to the battery compartment. We recommend using a 9.6v 1600 mAh nunchuck style battery with this AEG for great performance and reliability. The rail system is made of durable and lightweight CNC machined aluminum. The gun has an insane amount of rail space allowing the user to add virtually any accessories they might deem necessary. The upper and lower receiver are also full metal with a picatinny rail on top for adding optics. The charging handle is made to resemble the real-steel counterpart with the extended lever, locking bolt, and functional bolt release. Official H&K trademarks adorn the lower receiver giving the gun the most authentic look possible. Internally the gun is built like a tank with a fully reinforced, fully upgradeable, V2 gearbox with 8mm bearings. The hop up is fully adjustable for accurate shooting. Battery and charger sold separately.