MP5 Automatic (late beta) – Shellington Blasters

(1 customer review)


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LEAD TIME: Blaster Will Ship 2-12 weeks after order (late beta)


Basic InfoVideosFAQ

First automatic blaster from Shellington Blasters. Main features include fully automatic fire, modular cages, shell ejection, high capacity high performance blaster. And the entire project is basically a big excuse to build in the functioning famous HK-slap present in all MP5s.

I hope this platform will serve as the all-inclusive automatic blaster, and body kits will be added to transform the look between AK-pistols, battle rifles, and everything in between. For now, the base model will be a small sub machine gun pistol.
(Image courtesy of Adam from OFD)


Specs include:

– 6~7 darts/sec on 2S
– Modular cage with fps currently ranging from 90fps to 180fps on 2S, with 140fps (stock)
– Base blaster dimensions: 12.5″ x  2.35″ x 8.5″ (L x W x H)
– XT60 connectors
– 20 round Double stacked magazines
– Rear and Forward charging handles
– Forward HK-Slap Feature
– Shell Ejection (duh)
– Worker gen3 Half Dart compatible
– Quick pin takedown for repairs and cleaning

How do I use the blaster

To use the blaster, first load in the magazine and chamber the first round. This can be done by either pulling back and releasing the rear or forward charging handles. Make sure the slide is released quickly, as a slow release may fail to charge the bolt into battery.

Then pull the 2 stage trigger to first rev the flywheels and then to begin firing the blaster. At lower fps cage options, it becomes essential to rev the flywheels up to speed prior to firing.

In the case of a jam, remove the magazine to clear the shells before reinserting the magazine and repeating the steps.

How do I do the HK-Slap

To use the HK slap, we must first understand what it’s for. In the real steel version on the MP5, the HK slap was designed to give the operator a more secured way of successfully chambering a round when loading a new magazine into the firearm.

For the nerf version, it serves a similar purpose. Though its primary purpose is just because it’s fun. So to use the HK slap, you should first be either completely out of darts in the magazine, or have no magazine currently inserted in the blaster.

Then you pull the charging handle back and then up into the locked position.

Once the magazine has been inserted, you can now perform the iconic slap to unlock the handle and bring the bolt into battery to chamber the first round from the magazine.

While you can perform the slap with rounds left in the blaster, you will be ejecting an unspent round from your blaster, wasting the round. But it’s often worth it for the rule of cool alone.

What does beta mean?

Beta here typically means the blaster is not 100% ready for official release. In this case, we’re primarily working on improving the ease of building these in our shop while also improving build quality and quality of life things. However, the blaster in its current state is already firing quite well, or as well as you see in the videos typically. There’s good cycling, shot grouping and accuracy, and the feeding and ejection systems are working quite well.

The primary concerns to take into account when ordering while still in beta now is the extended wait times.

Does this have a semi-auto mode?

Unfortunately there is no fire control group present here. Part of the reason is we wanted it to be relatively more affordable instead of investing into a base model with fire control. But honestly, the blaster works well enough in a type of short burst mode anyways. But a fire control group is something we’re looking into adding to the shop in the future.

My blaster won't stop firing/Can I put a 3S battery in here?

Currently the blaster has cycling issues at 3S, so we do not recommend using one. What this means is that the blaster could fall into runaway and just keep firing forever due to the fire controller not being capable of handling the higher voltage of the 3S battery. This is also something we’re working on, as 3S would improve both the rate of fire and the muzzle velocity of the blaster.

Can you make a drum magazine?

Drum magazines are out of my scope at this time, but I don’t see why it wouldn’t work. The blaster does already work quite well with its 21 round double stacked magazine, so maybe having a 50 round drum magazine would be viable.




Additional information

Weight 5 lbs
Dimensions 12 × 12 × 12 in

1 review for MP5 Automatic (late beta) – Shellington Blasters

  1. ajthecreator (verified owner)

    Greetings dart-blaster enjoyers! I just received my mp5 auto in the mail, I wanna preface this by saying Ive gotten other blasters from shellington (spring thunder and wingchester) and ive got experience building and printing my own blasters.

    But i wanna talk about this blaster in question, The MP5 auto, so far I quite enjoy it. The shell ejection is smooth and enjoyable, the double stack mags fit well and (in my like 20 mins of use) have had no jams. The trigger is *stylish* and smooth, its dual stage btw. The blaster feels solid, but there’s a few gaps where you can see the other side through the blaster, but it seems just an ascetic flaw. The grip feels comfy to me, but its a little small for my batteries so i’ve gotta get a new one for a proper battle. The battery tray (in the grip) needs 4 screws to undo, and i wish it could be accessed without tools and didn’t take 4 of them to get at the battery. It has an automotive fuse built in which is a feature I absolutely adore, it means if a dart gets jammed you only risk burning a fuse not a whole motorcage. This beta version I received did not come with a stock, or any good sling mount. (i dont think he promised one or anything, im not sure there even was an option for one atm) one minor gripe is that the rail on the top doesnt cover the whole blaster and isnt screwed in on the front. Another very small gripe is at the moment there’s no orange at all on this blaster and no option for another colour scheme, but again, its in beta. A major plus is that it says ‘slap me daddy’ on the bolt, glorious. One thing about completed blasters from shellington, they take a long time to make, more time than the website says. (3-12 weeks I believe) I ordered this nov 6 2022 and got it sep 26 2023, and the other blasters Ive ordered have also taken like 6-10 months, which im not complaining about, the quality is excellent and probably could not be done much faster, i just wish they made that more clear on this website.

    “sh1t, i forgot to prime my flywheel blaster, this is awesome”
    -me after i got this blaster

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