Mould King 20001 – HJ-10 Anti Tank Missile – Speed Build Review

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If you are into technic bricks, you will miss out on the usual models. The Chinese HJ-10, on the other hand, consists almost exclusively of technic components and closes this gap in the field of military vehicles.

Manufacturer: COBI
Set-Number: 20001
Theme: Military
Release: 2020
Parts: 1689
Figures: 0
Age: 10
Building Time ca.: 7 Hours

This set was sent to me by


First, a gigantic sheet of stickers jumps towards us, which can be doubled by opening it. Even if the red star on the vehicle would be nice, I won’t bring up any of them. Although the stickers rarely go over several components, they have to be glued over beads, which then really no longer look nice. The actual instructions are completely colored and new components are framed in red. So you have to look very carefully so as not to overlook any part. Components for which the length is not directly visible are printed on a 1: 1 scale. There is also further assistance, for example if an axis has to protrude from a gear by a certain amount. By placing the components on the print, you can quickly determine whether you have built correctly.


Since this is a purely technic model, there are of course no panels with which we build the hull. Instead, it goes straight to the point with lift arms, molded parts and pins. The first motors intended to drive the tracks were installed relatively early on. A little later, a smaller motor will be used, which is freely mounted and will later take on various functions. For one thing, he turns the turret, raises and lowers it, and fires the missiles. A servo is used to switch the functions.

After all the motors are in place, the construction of the tub and various moving parts continues. After all parts have been installed that take care of the movement of the turret, the rechargeable battery box is inserted. This is later covered by a cover that can be easily removed. This makes it easy to switch the battery on and off. In the next few steps, the front and rear armor will be built using lift arms.

Now is the time to build the missile launcher. This can be raised and lowered with 2 small actuators. The actual firing mechanics are somewhat reminiscent of the crankshaft in a car. This will fire the missiles in sequence. However, this has a very big disadvantage. It is hardly possible to find a position where at least one of the missiles is not pushed down and does not click into place. I later changed this part so that all the missiles are fired at the same time. This makes it much easier to click into place.

As with any tank, it is the turn of the tracks at some point. For this purpose, rollers are pulled on longer axles and then pulled through lift arms. This gives you an independent wheel suspension with a simple but very effective suspension, which later proved itself in the field test. The chain is very massive and larger than the largest track from COBI. In addition, it is extremely stable and runs absolutely superbly with the engines.

In the last step, only the side armor is built. Here, bricks are connected with lift arms, which is not exactly easy due to the high clamping force.

The remote control can be done via the supplied remote control as well as an app from Mould King. Unfortunately, the app is not available in the Play Store and if you follow the link in the assembly instructions, you will end up on a page that Google warns of because malware was found there. So I decided not to test the app.


Mold King delivers an extremely stable model that is fully suitable for off-road use. The quality and clutch power of the stones is excellent and those who like to build technical models will certainly have fun here.

This post is also available in Deutsch.

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