Airtech Studios BEUTM Battery Extension Unit for AM-013/AM-014/AM-015 Series Amoeba Airsoft AEGs
(Color: Black)

"A solid piece of equipment I recommend to anyone who buys an ARES AM-013/014/015 cause it makes it so much easier to store LiPo's. Solid polymer construction and seems to fit (thus far) perfectly in place with no wobble or wiggling. fits up to 1500mah 11.1v stick batteries with some adjusting and easily fits smaller 1000-1250mah LiPos.

"Near perfect! It fits the gun perfectly and the only downside is a slight difference in color.

"So this gun is BA!!!!!!
Just bought it and have only a few cons.
Mostly just pros! I'll answer many people's questions on this review so people will hopefully get a better understanding of what they will be purchasing.
1. Battery compartment: is really small you WILL have to either buy the recommended battery for this gun (11.1v/7.4v PEQ size batteries not anything bigger than that or it won't fit without the extension) or buy the extension they recommend so you can keep your batteries you currently have. The extension works on the am-013/am-014/am-015 series.
2. The inner barrel length is 300mm. And the suppressor that comes with it DOES unscrew. Evike.com will send you the metal block tip to screw in place of the orange tip if your state allows you to play without it. They also send segmented rails and screws so you can attach various rail accessories.
3. This comes with a built in MOSFET all you need to do to program it the way you want is to buy the recommended programmer for this gun. It also features a quick spring change set up. So no need to tear into the whole GB to change it.
4. Does NOT come with a battery or charger or optic. And the rear sight doesn't adjust at all you either have to buy one that does or do what I did and bore a bigger hole to see out of.
This gun is sick and I would buy this over any krytac any day!! Plus it's cheaper...just saying