I don't really know how to start reviews so i'll get on with what you get in the box.
Gun
300rd plastic/polymer magazine
Basic manual with blow out diagram
A cleaning/unjamming rod of unholy length
I also got a ASG M90 spring for it aswell as some new flip up sights.
First impressions
The first thing i noticed about this rifle when i picked it up is how god-damn heavy it is! The receiver and stock are metal whereas the whole forward assembly are metal. So as you can imagine its rather front heavy (to put this into perspective, its like trying to use a see-saw with susan boyle on the other end) Performance was phenomenal very fast ROF and trigger response on a 8.4v but this was mainly due to the built in MOSFET (i honestly have zero ideas on what it actually is)
A quick shooting test to show the ROF/ trigger response
Specs
12" full metal OB
12" full metal octagonal key mod style RIS
Polymer upper+lower receiver
Battleaxe style stock with 2 QD sling mounts
420*blazed* FPS
Full metal internals
Trademarks/markings
The gun itself has lots of markings. None of which mention that the gun is airsoft, a generic rifle will usually have "cal.6mm" somewhere or other but in my opinion, to a untrained eye, these could look like real steal markings; and the dummy bullets in the mag window enhance the look even more.
Performance
From garden shooting i can tell you its a dream, since i've had it about a week/1.2 and its had around 3000 rounds through it and i've had zero lock ups or problems, apart from mags not feeding but i'll get onto that later. From the manual i can tell you its 11.1v lipo ready but i only use 8.4v 1600 mah batteries for the moment. I'm skirmishing this gun for the first time on wednesday so i'll update this then when i have some answers. One problem i had was the hop up is a little finicky and with this guns 420fps it has a little backward recoil so that does cause it to move out of place, tape will keep it steady though.
Features
This rifle boasts ares' new quick change spring gearbox, which im yet to use but it'll be a further update. Externally you have all the basic features of an M4: Dust cover, bolt, bolt release, mag release, left sided fire selector etc. The top reciever has a look of a VLTOR one to me but i could be mistaken, the lower is a plain m4 style with a few more curves and ridges. Along the 12" handguard there is space for RIS sections. Included are 2x small 1x medium and 1x large. These give you space for torches, grips etc. Due to the shape and length of the stock handguard it does force you to use a Chris Costa style grip, unless you move the base RIS piece forward and use a vert grip but i would assume that could get uncomfortable due to weight distribution. The outer barrel is octagonal and has a standard barrel nut. It uses a clockwise 14mm thread with an included Magpul style QD flash hider (full metal)
Modifications
For the moment the only things i've done to this rifle are change the sights, this is really the best thing to do as soon as you get he gun as the ones included are trademarked "Toys industries" and only have one hole (aperture?) which is about as tight as your dads walet after a divorce. Secondly, i replaced the spring to bring it down to 290-310 FPS making it suitable for indoor play. In the future i plan on installing a 10.5" outer barrel and a 9.5" DD MK18 rail and if needs be, a crane stock.
Cons
The main downfall of this gun is its mag compatibility, it will fit them but when they try and feed, the BB's will spray all into the trigger and gearbox mech so this is something to watch out for when making a purchase. Second con is the loose hopup wheel but is an easy fix.
Thats the end i guess, i'll be updating this regulary with any problems/modifications.
Enjoy!