The Elite Force Competition M4 series AEG is still the same great affordable AEG with some improvements to make it even better.This new version features upgraded internals including a reinforced tappet plate and a micro-switch trigger for better trigger response. The new style stock is also a very welcome change with its easy to access battery compartment. Length:22.5" - 25.75", Adjustable Inner Barrel: ~190mm Magazine Capacity: 300rd Hi-Capacity. Works with Matrix, G&G, Tokyo Marui and other compatible M4 / M16 Series Airsoft AEG Magazines Muzzle Velocity: ~315 FPS (Measured with 0.20g BBs) Gearbox: Ver 2 Full Metal, Fully Upgradeable Motor: Long Type Fire Modes: Semi/Full-Auto, Safety Package Includes: Gun, Magazine, Manual Battery: 9.6v Small Butterfly Type recommended (Battery not included) Hopup: Yes, Adjustable