H&K MP5A4 Full Metal Airsoft AEG Rifle by Umarex

Elite Force / Umarex43857
4.0 stars, based on 3 reviews


ID: 43857 (AEG-2278060)
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.
This gun has a muzzle velocity rating (FPS) between 366 and 500, and is compliant for export to Canada.

3 Customer Reviews

by Norman B. on 03/07/2016
"Always loved MP5 rifles, this one is true to the feel, had only two issues - 1) had to modify replacement mags as they did not fit into mag well. 2) trigger contacts not correctly aligned and burned contacts with in 2000 rounds, Repaired trigger and gun works flawlessly. This is a good cqb gun and the price is fair. Very happy with it.
by MICHAEL J Y. on 06/06/2015
"First of all I agree with Adam on this gun having a poor fire rate however the power it propels bbs is uncanny.

The quality and ease of this gun in tearing it down is incredibly exceptional.

To rectify the poor fire rate id recommend a Lonex A1 motor which is what I did to mine. Fire rate issue was fixed and even a 9.6 battery pulls this very well. for trigger response id recommend a 7.4 lipo if and only if you do the motor upgrade.

As far as accuracy the stock barrel worked better for me than even a 6.01.
by Adam F. on 01/21/2015
"I have had the Umarex (VFC) MP5A4 (3 round Burst Model) for about a month. I will break this up into 3 sections.


The externals are very good for the most part. The charging handle is the best I have seen on an MP5 and not going to break doing the famous HK slap. I was put back by the fact that this MP5 have a proprietary PLASTIC treaded 3 lug flash hider. This means that if you are going to use a treaded (14mm CCW). They will strip very easily. I often use a tracer unit and am wondering how much use I will get before the threads are no longer useful.
The rear iron site on my copy was seized up and would not move I had to take a mouse pad and vice grips to free it.
The magazine well is very tight and the include high cap take a good amount of effort to fit into the mag well. I ordered Matrix(cyma) metal 100 round mags and they almost dont fit I had to put them in 20-30 times to get them where I can take them in an out with 5lbs of force.
The rear stock is different then most MP5's and must be removed from the gun to have the battery installed. It also has a real MP5 type sling mount on the stock limiting yourself to only small type batteries or stick batteries.


I have not opened the gearbox yet but so far the ROF is very slow so I am assuming that the stock motor and gear ratio is less then desirable. With a 7.4v Lipo I get about 10 RPS with 15 RPS with an 11.1.
This gun has propriety gears due to the mechanical 3 round burst. If you strip your gear set you will only be able to replace it with the factory set.
My copy is not accurate at all about 50 ft out of the barrel the gun start to shoot far left. Does this consistently. I pulled the barrel apart cleaned it and put in a new nub and bucking with the same results. I will be in the market for a new barrel shortly. At 100 ft it is shooting 10' to the left you can see the large curve when shooting.
I will also be upgrading the stock motor to hopefully get ~ 20 RPS (7.4v Lipo).
The FPS on my copy is about 370 with .20 BB's


I give this 3/5 stars. There are much better air soft guns for the money and I would not recommend this at this point. If you want an MP5 the ICS or G&G copies are better. This falls into the average category and is quite expensive for what you get. If you have the need for the neat 3 round burst feature and can live with the stated issues this may be the gun for you.

- Decent externals as long as you do not plan on using a threaded barrel extension/Tracer.
- Strong FPS for CQB Gun (Pro/Con)
- Horrible Accuracy (Bad inner barrel?)
- Will require upgrades (Poor CQB ROF)
- Limited upgrades by mech 3 round burst
H&K MP5A4 Full Metal Airsoft AEG Rifle by Umarex
H&K MP5A4 Full Metal Airsoft AEG Rifle by Umarex

  • Fully Licensed by H&K
  • Etched Trademarks with Individualized Serial Number
  • Full Metal Upper Receiver and Barrel Assembly
  • Nylon Polymer Lower Receiver and Hand Guard
  • Selectable 3-round Burst
  • Nylon Polymer Fixed Stock
  • Fixed Front and Adjustable Rear Sights

  • Length: 680mm
    Weight: 2800g
    Inner Barrel: ~210mm
    Magazine Capacity: 200rd Hi-Capacity. Works with Tokyo Marui, G&G, Umarex and other compatible MP5 Series Airsoft AEG Magazines
    Muzzle Velocity: 370~390 FPS (Measured with 0.20g BBs)
    Thread Direction: H&K 3-lug Design
    Gearbox: Ver 2 Full Metal, Fully Upgradeable
    Motor: Long Type
    Fire Modes: Semi/Full-Auto, 3rd Burst, Safety
    Package Includes: Gun, Magazine
    Battery: 9.6v Small Butterfly Type recommended (Battery not included)
    Hopup: Yes, Adjustable

    Manufacturer: Umarex (Licensed by H&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.

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

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

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