Specs I found for it:Metal Gearbox
Easy Power Up System
Bolt Locking & Functioning Bolt Lock
CNC Realistic Marking
Aluminum Housing, Outer Barrel & Flash Hider
Lower Receiver Can Fit Real Steel
Quick Spring Change Feature
Battery Type: 9.6v 1500mah Ni-Mh Nun-Chuck Battery
Magazine Capacity: 130 Rounds
Mode: Safe / Semi / Full Auto
Material: Nylon Fiber + AI. Alloy
Motor: High Torque Flat Head
Hop Up: Adjustable
Length: 30.7 - 34 Inches
Weight: 6.8 lbs
Effective Power Range: 1-100 Feet
Accuracy Range: 1-165 Feet
Maximum Range: 220-230 Feet
Just another websites that sells it, but for more:http://www.taairsoft.com/product350082_1534466.aspxhttp://www.redwolfairsoft.com/redwolf/airsoft/AEG_AEP_ARES_ARES_M4A1_Carbine.htmhttp://www.airsplat.com/Items/ER-ARES-M4A1-17.htmLook around on the other sites, see if there are any reviews. I can't really say, because I've never had an auto or battery powered. The most I've had is a gas powered semi-auto.