Classic Army sets the standards for the entire industry to follow suit, and is one of the top leading manufacturer of airsoft products. Classic Army has been an innovator in design and production of airsoft guns for new enthusiasts and seasoned veterans, offering a wide selection of products to suit all playing styles. Classic Army used nylon fiber reinforced polymer allows for a lightweight platform while ensuring extreme durability in a cost effective package. The 390 FPS with a 300 round magazine means you can unleash almost unlimited firepower to your enemies, making them run for cover. The MLOK rail system is basically a skeletonized version of a standard RIS M4 rail, perfect for the attachment of a wide variety of optic and tactical accessories. Front and rear iron sights are integrated into the rifle which are perfect for zeroing your target as is, or can be flipped down to clear the way for your favorite optic scope. The adjustable rear stock makes it easy for players of all sizes to use this rifle with no limitations, while also making it easy to adjust to CQB and long range battle modes. The 9mm bearing & bushing combo inside the full metal gearbox ensure smooth and reliable gear change and long lasting durability. The integrated inline MOSFET unit and high quality wiring inside the rifle protects the trigger contacts from wear and tear and greatly reduces the need for maintenance. This rifle comes with a Quick Change Spring System which allows the user to quickly and easily alter and upgrade the overall power and fire rate of this M4, offering ultimate customization. Classic Army has made this weapon skirmish ready by including a 9.6v LiPo battery and standard charger with every rifle package. By combining a rugged metal build with the power and accuracy needed to out-gun the competition, Classic Army has created an AEG that will surely resonate with players of all skill levels and play styles.