This M4A1 from DBoys is a high quality AEG perfect for any budget and play style. This carbine features a full metal body, metal barrel assembly, full metal gearbox and newly designed adjustable crane stock. The ergonomic motor grip ensures perfect grip in any battle conditions and greatly reduces player fatigue by improving overall maneuverability. The adjustable crane stock quickly alters the overall length of this rifle for easy transportation and CQB engagements. Use the integrated A-frame style frontsight and adjustable rear sight to quickly and accurately zero in your targets. This full length M4 rifle features a sturdy lightweight construction, perfect for beginners to airsoft or younger players. The functional charging bolt and removable metal carrying handle adds to the realism of this replica, and can easily be removed to make room for your favorite optic accessory thanks to the built-in 7” 20mm monolithic rail. This M4A1 rifle features a full metal Version 2 Gearboxes, which can be easily upgraded or modified to user preference. These gearboxes come out swinging with an upgraded motor with 8mm ball bearings to ensure the gears spin more efficiently with less friction and less need for repairs. The 440 FPS (0.20g BB) ensures you can easily use this rifle in long range engagements while still being manageable in CQB engagements when needed! The universal design of this rifle allows for easy aftermarket upgrades for both internal and external parts. Low resistance wiring is used throughout this whole rifle, to greatly increase smooth electrical flow from the battery. Use the adjustable rotary style hop-up, accessible when the charging handle is pulled back, to account for range and wind conditions, making sure no enemy is safe! With unique aesthetics, high grade performance, and a modern ergonomic design, the M4A1 rifle from DBoys is the perfect reliable and affordable option for airsoft enthusiasts.