Things I liked:this battery is amazing it holds its charge for a very long time and increeses your rate of fire on any aeg. Also fits very good in my classic army m 15a4. Things I would have changed:the only bad thing about this battery is the wire that connects the 2 batteries together. u can barely see it in this picture but it is a little short. and mine broke from stress on the wire, but i easily fixed it with electrical tape.
Things I liked:First of all this gun is outstanding. the internals are awesome and the exterior is to. i have 2 guns this one and a classic army m 15a4 and i haft to say i like my echo 1 way better that my classic army. the echo 1 has better internals, but its got a plastic body. the plastic body is very well put together, almost as good as the Tokyo marui guns but, it is no comparison to the feel and weight as a metal one. Also the whirring in the for grip is very neet and the wires seem to be 16 gauge. Things I would have changed:some things that i would change is the for grip. it is very loose and can easily come apart. Also the back sight (the part where the circle is) wobbles and can throw your accuracy off a bit. other than that this gun is amazing. What others should know:why wast your money on a "high end" airsoft riffle like a classic army or a ics when u can get this, think about it