armoury
DOUBLE EAGLE M904A FCS
“THE FITTING OF THE FRONT RAIL IS UNUSUAL, USING A “MOUNT REGULATOR”
RATHER THAN THE “NUT/DELTA RING” SYSTEM (THIS IS FULLY EXPLAINED IN THE
INSTRUCTION MANUAL) BUT IT MAKES THE FITMENT OF THE RAIL TO THE UPPER
RECEIVER 100% ROCK SOLID.”
MODERN AND SOLID
The M904A is undoubtedly an “AR-style” AEG and benefits
from a very nice 310mm alloy front-end with M-LOK style
accessory attachment points, an alloy outer barrel with gas
block and an alloy buffer tube. The fitting of the front rail is
unusual, using a “mount regulator” rather than the “nut/
delta ring” system (this is fully explained in the instruction
manual) but it makes the fitment of the rail to the upper
receiver 100% rock solid. This does mean that you are
restricted to DE Airsoft compatible rails if you want to
change it, but the “factory rail” is so nicely done I don’t see
why you would want to!
The receivers, uniquely-styled sliding stock and
ergonomic pistol grip are all polymer/high-grade nylon fibre
and have a really great finish to them. The 904 also comes
with an unusual flash-hider (14mm CCW) which personally
I like, and flip-up sights mounted front and rear as
standard. These are rail mounted and the top rail is 100%
contiguous along the top of the carbine. I particularly like
the receiver style, which is blocky and modern-looking and
the lower even features a slightly flared magwell to help
with swift reloads. The 300 BB metal mag is a simple metal
STANAG style that although nothing special to talk about
works well and I found that pretty much every AR mag I
own fitted just fine.
Internally things appear pretty solid too, with an easyto-work
on V2 gearbox with a quick spring
change system, allied to 7mm steel bearings
and rotary hop. Again, this is not earthshattering
tech but solid, workmanlike and
easy to upgrade at a later date should you
wish. However, in addition, as standard, the
904 has the FALCON EFCS and THIS is where
things get properly interesting as you can
access the programmable fire mode which
offers a plethora of settings. You can choose easily between
double-tap on semi mode, or 1-5 round burst on auto
and you can even adjust trigger sensitivity, with the added
bonus of motor and battery protection!
DE Airsoft stress in the accompanying (understandable
and thorough!) paperwork that the FALCON system is
only compatible with 7.4v and 11.1v LiPos and is NOT
compatible with LiFe or NiMh batteries but that doesn’t
really limit your battery choice these days, does it? Battery
storage for the 904 is in the buffer tube and is T-Plug/
DEANS wired, although in a nice little “accessories box”
that comes with the AEG you get an extender/adaptor to
change things easily to Tamiya.
GOOD VIBRATIONS!
First up, DE Airsoft advise that you set the selector lever
www.airsoftaction.net 23