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Matrix "Calico Jack" Polymer M4 Airsoft AEG Rifle w/ M-LOK Handguard & MOSFET (Model: SBR / Tanker Stock / Black)

ID: 20717 (AEG-MTX-M904X-BK)
M904 BK 400 PDW / M904X BK
Matrix859188207172M904 BK 400 PDW / M904X BK20717
4.8 stars, based on 40 reviews
Matrix Calico Jack Polymer M4 Airsoft AEG Rifle w/ M-LOK Handguard & MOSFET (Model: SBR / Tanker Stock / Black)
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Optic not included
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MatrixDouble Eagle


Canada Export CompliantCanadaExport Compliant
This gun has a muzzle velocity rating (FPS) between 366 and 500, and is compliant for export to Canada.
Free ShippingNo Coupon Required
Free shipping within lower 48 US states, no coupon code needed!


  • Features the new "Falcon" version 2 gearbox, complete with quick change spring, 8mm steel bearings, and a rotary-style hop-up
  • Falcon electronic control system can control fire mode and trigger pull as well as provide battery and motor protection
  • Ambidextrous fire controls provide comfortable use for both righty and lefty shooters
  • M-LOK slots around the handguard run the entire length for easy attachment of accessories and tactical devices
  • Billet-style nylon-reinforced polymer receiver enhances external reliability and gives a unique, distinct appearance
  • Compact tanker stock is perfect for CQB and features plenty of battery space

Manufacturer: Double Eagle

FPS Range: 380-410


Dimensions (Adjustable): 685-780mm
Weight: 2060g
Magazine: 180 Round Mid-Cap
Gearbox: Ver. 2 / Fully Upgradeable Metal Gearbox
Battery: 11.1v small stick type recommended (Battery not included, wired to stock w/ Standard Deans connector)
Hop-Up: Yes, Adjustable
Firing Mode: Full / Semi and Safety (Programmable Burst Feature Available)
Package Includes: AEG, Manual, Mid-cap Magazine

About Matrix

Established in 2001 for Airsofters by Airsofters. Team Matrix thrive on the vision to better the sport of Airsoft with affordable high quality Airsoft equipment. With decades of experiences as Airsoft enthusiasts ourselves, we live, sleep, and breathe Airsoft. Matrix offers a wide selection of skirmish grade replicas from rifles to pistols, a wide variety of accessories, and tactical equipment from helmets to boots. It is the Matrix mission to prepare every Airsoft shooter the perfect experience!

40 Customer Reviews

(Write a review)

by Anthony S. on 11/08/2023
"First M4 model gun, and verdict: Go with this one if you can't find a better one.

Mostly metal build
Lots of picatinny space
Good quality magazine (not a wind up and its mid cap though)
Extremely accurate
Good iron sights
Adjustable stock

Not very much space for batteries
Battery makes it hard to put stock back in

Overall very good gun
by Alden W. on 04/23/2023
"For me, it's a really nice gun. With an 11.1v battery, it shoots like a 300-350 rifle and the trigger response is crisp.

not very expensive for the performance
shoots amazingly
pretty light

many proprietary parts to worry about (I tried to buy an aftermarket outer barrel and it didn't fit with the stock barrel lock)
stock is wobbly for me
by Chadd P. on 09/17/2022
"Very good gun for the money. The black cap that covers the end of the stock comes off easy, but just don't use it. Much easier just to tape a battery (or two for a quick swap) to the side of the stock. Mine had pretty low fps out of the box, but adding a new spring was very simple...Remove the stock with 1 screw.

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