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A&K Systema Clone M4A1 STW Airsoft Professional Training Weapon Rifle - Zombie Killer Special Edition

ID: 49589 (AEG-STW-ZK)
4.7 stars, based on 10 reviews
A&K Systema Clone M4A1 STW Airsoft Professional Training Weapon Rifle - Zombie Killer Special Edition
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This item is currently Sold Out

MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.
Canada Export CompliantCanadaExport Compliant
This gun has a muzzle velocity rating (FPS) between 366 and 500, and is compliant for export to Canada.
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FPS Range: 420-450

The A&K STW is a solid Airsoft AEG utilizing the Systema PTW engine design for features such as "stop firing when magazine is empty" and "quick swap of various FPS cylinders" to be possible. This "Zombie Killer" special edition features crisp trigger pull, reinforced internal from the stock A&K, internal mosfet system, adjustable hopup, USA warranty, 400+ FPS cylinder and more of what you will normally only find on a Systema PTW.


  • Solid internal design, based on the Systema PTW
  • 120rd magazine with automatic cutoff when rounds run out
  • Crisp trigger pull
  • Realistic, heavyweight build quality
  • Internal MOSFET system
  • Full metal receiver, stock tube, and barrel assembly
  • Fully adjustable hopup
  • Quick swap Cylinder design
Length: 805mm - 905mm, Adjustable
Weight: 3540g
Inner Barrel: 360mm
Magazine Capacity: 120rds. Works with Systema, Celcius, Matrix and other compatible PTW / CTW M4 Series Airsoft AEG Magazines
Muzzle Velocity: 420~450 FPS (Measured with 0.20g BBs)
Thread Direction: 14mm Negative
Gearbox: PTW Style
Motor: PTW
Fire Modes: Semi/Full-Auto, Safety
Battery: 9.6v Small Butterfly Type / 7.4v LiPo recommended (Battery not included. Wired to the stock with a Large Tamiya connector)
Hopup: Yes, Adjustable
Package Includes: Gun, Magazine, Manual

Manufacturer: A&K

Things you may need to get started:
    Battery and Charger – Required to power your AEG; use a high quality battery and charger for best results.

    Spare Magazines – Stay in the fight longer by bringing more ammo with you.

    BBs – High quality precision 6mm BBs recommended; Use 0.20g – 0.25g BBs for best results.

    Silicone Oil – Basic cleaning and lubrication maintenance help keep your Airsoft AEG in top working order.

About A&K

A&K has been in business for more than a decade, boasting a huge selection of popular rifle models as well as unique platforms; Machine Guns, SMGs, DMRs, and even WWII replicas. A&K provides a great lineup of Airsoft products at a great value.

10 Customer Reviews

(Write a review)

by Kenneth L. on 01/09/2017
"I decided to make another review on the Zombie Killer edition PTW. After owning it for a year, still shoots fine and I barely have done any major upgrades to it. I swapped the inner barrel to a 6.04mmx310mm to make an SBR, swapped the steel outer barrel for an aluminum, replaced the original style hopup chamber to the RWA Hopup chamber (rotary style), electronically still stock and not moistured proof. I switched to the MAG steel curve roller which is pretty freaking awesome once it breaks. The original cylinder busted open inside my PTW, but that was my fault for leaving some play inside the upper receiver where the cylinder rest on the buffer tube cap.

The vibrations of shooting made the piston head unscrew itself making me lose fps from 418 to 330 and dropping per shot. Replaced it with a King Arms from another fellow PTW user and saved me over $150 for an authentic Systema cylinder. Now I'm consistently shooting between 360-370 fps using .20g. Probably will drop to CQB limits with a .25g BB.

All in all, I really enjoy my PTW clone and I'm probably going to get another one to replace my regular franken M4 and this new one will have an 6.10 Orga barrel, rewire it to Deans, and when it smokes out, replace all wiring with Etiny or FCC.
by melisaa r. on 08/02/2016
"This gun is really sterdy with barely any wobble and comes with the upgraded blue cylinder. Built like a tank and hasn't broke after me buying it 6 months ago. Highly recommend and is a 1:1 scale
by Donald B. on 06/27/2016
"Will say that this is an amazing weapon for the price. I have used many Airsoft weapons in my games and am a decent tech. I own 2 HPA polar star Jack set ups, a CYMA M14 that that is an amazingly accurate weapon once upgraded with M130 and R-Hop, both an M4 and M14 GBB, a bolt action sniper and an M3A1 grease gun for CQB fun. I only add this to let you know that I have used many Airsoft platforms over the years.

I have a WE Tech Katana, and really liked the concept, but honestly, they should have spent six more months in R&D before bringing that one to market. It is now an HPA Jack : ) Great try, but plagued with too many issues, and after a couple years of consistent failures I was ready for something else. This brings me to the A&K. I have aways used A&K 60 round mid caps because they feed flawlessly and are a very well made product. I have heard both good and bad about A&K but it seems to be that you get what you pay for, as with everything else. I have known about the Systema clone and have been considering it for quite some time, and after using it, I believe this to be a top line weapon platform for them.

Let me say that I am not disappointed. Right out of the box it feels solid and is full of real steel. It has a nice weight and I measured this one at 7.4 lbs on my electronic scale with empty mag. Furniture is high quality and feels great, no wobbles, shakes, or other disappointments. I ordered an Orga hop up with it because I have used them in my HPA Jacks with the Deepfire New Hop Up barrels and they are great. I also added an aftermarket hop adjust square spring that is way better that the rubber springs that all Systema hop ups come with. You can find them at Scopeandlaser, I have not found them anywhere else. Sorry Evike, but you cant stock everything. I also changed out the stock large T connector for a Deans plug before even trying to fire it.

Using 11.1 1200 mAh 20C/40C BURST lipo I achieved 18 RD/Sec, and the stock blue Cylinder gave me a consistent 420 +/- 2 FPS. I am consistently hitting man sized target at 87 yards/261 feet using .30 gram BB, measured by range finder. Impressive.

I have done no other upgrades, and probably will not. I must say that out of the box, it feels great, and shoots great with the Orga Hop up, Can not vouch for the stock hop, but will note that it is high quality CNC steel hop up instead of the cheap pot metal that so may Systema hop ups use. I will probably achieve a little better range once I have broke in and fine tuned the hop and find the right BB weight that this weapon likes.

5/5 stars


Build quality is great (lots of steel parts).
I like the markings, (personal preference).
Shoots well right out of the box
Systema parts all fit.
Stock Hop Up is high quality CNC steel
Magazines are high quality and clip in and drop out smoothly, $15.00 EACH (I bought 6 extra)
Weight 7.4 lbs
ROF (could be a con to some), but I like the ROF because it is same as real steal.

With the mags and electronic bolt catch, makes a good training weapon. I set all my weapons that have full auto to around 18 RPS including my Jacks


Should come with a deans connector, or have option during ordering to have one installed.
The magazine BB follower will come out if you are not careful how you handle the mags (all Systema) (think I'll buy extra and keep them in a medicine bottle)
The rather large MADE IN CHINA laser etched marking on the forward assist side if receiver (I carefully taped around it and hit it with some stove black paint, now it's tolerable).
I did not not buy this two years ago and waisted it on my Katana instead

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