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  • backviper b3814 electric rifle in black/clear
  • backviper b3814 electric rifle in black/clear
  • backviper b3814 electric rifle in black/clear

Blackviper B3814 M4 fully auto Airsoft gun in Clear

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£59.95 £89.99
(You save £30.04)

The sales of this item has been restricted to adults only. There is no minimum age requirement by law to use this item, however adult supervision is recommended at all times.

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  • Description
  • Video Review
  • Warranty
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  • User Reviews
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Blackviper B3814 - M4


- 400 Round High-Cap Magazine
- Solid polymer Body + Gearbox Shell
- Full Stock
- 300 Fps
- Adjustable Hop-Up

Skirmish Entry Grade Weapon -  


New from blackviper Here we have a fantastic entry level practice gun with a surprisingly high FPS and ROF,
This BB Gun DOES have a plastic shelled gearbox, but this is set up in such a way that it can withstand the ROF, and
will not break down on you for no reason.
This is a fantastic weapon to begin airsoft on 

This weapon has an incredible rate of fire for such a cheap price, 

we also sell replacement mags for this gun here

it comes with a uk 3 pin charger and rechargeable battery pack in the box.


Magazine: 400 Round High-Cap Mag
Measured velocity:  300 fps
Hop-Up: Fully Adjustable
Fire mode: Semi/Auto
Body material: Polymer
Barrel Type: Metal 

Sku :


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Need Buying Advice?

Here is a collection of articles to help give you an informed decision to help you buy the best electric rifle that suits your needs. this advice is not specific for this gun but electric rifles in genral.

Product Reviews

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  1. Powerful for the price 3 Star Review

    Posted by Luke on 14th Sep 2017

    Thus gun has a great firing distance. However, first impressions out the box was nt great, gun feels really plasticy. Battery isnt lodged in the battery holder either, I just rattles about. I was supposed to buy the more expensive version, however the email was ignored and the order was sent out the next day. Due to it being a muck around gun it will not be sent back. This isn't a gun for a serious airsofter, or someone who wants to start properly.

  2. Highly recommend 5 Star Review

    Posted by Joe on 30th Jul 2017

    When I bought it I was so happy

  3. Wrong instructions, but good 4 Star Review

    Posted by Patrick on 13th Feb 2017

    I received the wrong instructions with mine, so I have no clue how to access the hop-up (if any reading knows how please put it in a review) apart from that it is awesome and can be used straight out of the box.

  4. Quite good 4 Star Review

    Posted by Unknown on 11th Feb 2017

    It is really quite good, the only issues is the instructions i received were for an R7, so i have no clue how to access the hop up

  5. Worth 4 Star Review

    Posted by James 01 on 12th Apr 2016

    the stock and the rails look absolutely beautiful, not to heavy, it also come with a sling.
    However, the front barrel and front site are not black, its clear, different from the pictures shown, plus the gun is a bit long. The rails and barrels are not removable without removing the screws.

  6. I've got spots everywhere!! 5 Star Review

    Posted by Lewis on 4th Mar 2016

    This amazing gun has been one of my best purchases by far, and love every moment with it, besides when I'm the one getting shot with it, and does anyone know the actual length of the gun please then email me
    Thank you

  7. Solid 4 Star Review

    Posted by Unknown on 3rd Mar 2016

    Solid build, lots of rails to add extras
    Excellent power and high rof

    Gun jams easily, plastic gear box temperamental (had to completely disassemble gun to push cog that had slightly slipped)

    Overall looks awesome, fires well. Would recommend.
    Delivery was next day on express

  8. Great gun 5 Star Review

    Posted by wayne dunnicliffe on 22nd Oct 2015

    Another great gun blackviper do it again

  9. m4 5 Star Review

    Posted by Cam24spurs on 22nd Oct 2015

    Hi i recently brought this gun and its amazing the range and fps is brilliant. However the bullets seem to fly upwards whenever i shoot the gun is there any reason for this? Would be much appreciated if someone could help me!

  10. trucking awsome 5 Star Review

    Posted by Yah mums fat ass on 22nd Oct 2015

    My mate has this gun I borrowed it for a skirmish because my ak 74 is getting repaired


    Accuracy little bit of wind and the bb go's all over Tue place

  11. Good rifle but sights are way off due to design 3 Star Review

    Posted by Unknown on 13th Jul 2015

    This was my first ever airsoft rifle, I was happy with the build of the gun and the function but there was only one major downfall, there is an extra ris rail on the top, it looks nice because it's black, but this means that the rear sight is raised a little bit taking it out of line with the front sight, so you are looking down on the sight and the rifle will always fire higher than what you have aimed at, I managed to take than rail off, there is fully usable rail underneath it that perfectly lines up the sights, but doing so allows the front rail houser to rotate and just float around, since the back rail is the only thing keeping it static, maybe there is something else I could do, maybe yous could get back to me on this, it would be a great help, thank you

Delivery Prices start from just £2.50 with free delivery on orders over £50 To the uk mainland *.

Tip - The easiest way to check the shipping cost for what you want to buy is put all of the stuff you want in to your basket. Then in your basket under the sub total there is a link for Estimate Shipping & Tax” click this and fill in the details and it will tell you the shipping cost and if you qualify for free shipping



Free Shipping

Free shipping on orders over £50 To UK Mainland (excluding some parts of scotland) 

Free shipping on orders over £100 To Northern Ireland & the Republic of ireland, Scottish highlands & islands, and I.O.M

Sorry we do not offer free shipping to the Channel Islands


Free shipping is a 5 working day service* (if you order Monday you get it the next Monday)


Delivery price (Mainland UK) 

Royal Mail              (depending on weight)          (2 Days Delivery*From  £2.50 
Economy               (post as much as you want)  (2 to 4 Days Delivery*)   £4.75   Flat Rate
Express shipping  (post as much as you want)  (1 to 2 Days Delivery*)   £5.95  Flat Rate

*Working days (Saturday and Sunday are classed as non working days)

we can arrange a Saturday delivery on request but costs £20 and you will need to call us to pay the balance after making an order.  

Delivery price (Ireland, Scottish Highlands & Islands)

Northern Ireland           From £ 5.95
Highlands and islands  From £5.95
I.O.M                             From £5.95 

Republic of Ireland £6.95  (Flat Rate how ever big or small your order is)
Channel Islands £ 7.95 (Flat Rate how ever big or small your order is)

Delivery price (International Tracked)

(Flat Rate how ever big or small your order is)

Republic of Ireland (IRL)----  £6.95  Price Drop WAS £16

Belgium (BE)---------------  £7.95 Price Drop WAS £15

Netherlands (NL)----------  £6.95 Price Drop WAS £15

Germany (DE)--------------  £6.95 Price Drop WAS £25

Luxembourg (LUX)--------- £9.95 - NEW 

France (FR)-----------------    £9.95 Price Drop WAS £25

Austria (AT)----------------   £11.95 - NEW 

Greece (GR)----------------   £12.95 NEW

Sweden (SE)--------------    £14.95  NEW

Denmark (DK)------------    £9.95 Price Drop WAS £15

Finland (FI)---------------   £15.95 NEW

Italy (IT)------------------   £11.95 Price Drop WAS £16

Portugal (PT)-------------   £11.95 Price Drop WAS £18

Poland (PL)----------------- £9.95 - NEW

Spain (ES)-----------------  £12.95  Price Drop WAS £23

Sweden (SE)--------------   £11.95   Price Drop WAS £15

Slovakia (SK)-------------    £11.95 - NEW

Slovenia (SL) ------------    £11.95 - NEW

Croatia (HR)--------------   £16.95 - NEW

Czech Republic (CZ)-----  £10.95 - NEW

Hungary (HU)------------   £10.95 - NEW

Bulgaria (BG)------------   £14.95 - NEW

Romania (RO)------------  £13.95 - NEW

Switzerland (CH)--------- £12.95 - NEW

Turkey (TR)--------------- £17.95 NEW

Channel Islands ----------£ 7.95  Price Drop WAS £15


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