"Overall assessment: 8/10 with the only drawbacks being the mag well is a little large and all the mags I tried were loose in the mag well. After a full game day, I never had one fall out so it wasn't an issue. Also, the top ris mount is loose and cannot be tightened due the mounting position. Again, this wasn't an issue as my optic never wobbled about. The overall fit and finish is excellent. You will not be disappointed at all in this aeg. Don't let the "polymer" body scare you off. It's very heavy duty and won't be an issue. It's also very similar in material to the real steel version.
Here are some details not widely published:
OEM'd by S&T as label on the box stated
Mine shot 363 at 16rps with 0.25 EF bio's
0.4oz's lighter than real steal version (so accurate rep of real steel)
Very responsive & easily adjustable hop-up
8mm metal bushings
High torque motor
Use common sense on battery power
1200mAh 20c lipo with alarm barely fits in compartment
Dean's conversion won't void warranty per email with Umarex
Started most recent game day with full lipo (4.2v 3 cell). 3.88v were remaining after a full game day with the electric blow back enabled the whole time. As you may or may not know, 3.6v is the threshold for lipo's.
Overall length of this aeg is shorter than my MK18 cqbr with the stock fully extended"