A lego repeating crossbow with magazine and rotating reloading arm. With Pro-building instructions !



After uploading the video of my first crossbow, you were many to ask for instruction. I did not make it because this crossbow was not perfect, regarding the reloading, reliability and power. That is why I decided to create a new crossbow with better loading and reloading and power.


The model was inspired by a Chinese Repeating Crossbow, you can read here an article about it to understand the functioning. The basic functioning is to have a rotating arm which reloads the arrow with a little gap at the end to lock the string. Then the trigger pushes the string and liberates the arrow.


The main points are the little gap to lock the string, and the design of the magazine. The first in order to lock correctly the string without damage it, and release it without too much force on the trigger. The second point is in the front of the magazine, in order to release one arrow by one arrow and lock it when the magazine is reload. The arrow is stuck partially in the magazine when the string pass through (the sliding path is lower than the string).


Also, the crossbow is equipped with some interesting design for better handling. Including a solid body to hold it, two small pin in order to lock the loading arm in loaded position (right or left handed person). To finish, the magazine can stock 7 arrows and is very reliable. That is why I have made building instructions !

Building Instructions

As I said I have made pro building instructions using MLcad and Lpub. As usual, you can buy it for 5€ and then download the instruction immediately. Here is the complete bill of material in picture file : Crossbow_page_42

But you can also checked it on rebrickable (or make any export you want)

Want to know if you can build the Crossbow ? The Crossbow  has been indexed to rebrickable, check it !

By using the next up paypal button, you will get the pro-building instruction in PDF for 5€.

- Get the building instructions for 5€

After your payment, click on “return to MocShop” and wait for the redirection, you will be redirected directly on the PDF file.

If you browser can read the PDF, please wait until the end of the download (it can take some minutes) and after save it on your computer. Please Note that this page will be opened only one time so please be patient to download and saves you copy of the PDF. If your browser can not read the PDF, you will be ask to save it directly on your computer. If you have trouble to download your copy of the PDF after payment, please contact me using the “About Page”. Note that you can print it, but not copy or distribute. Many thank you for supporting my work :)

Important note : Please consider that this crossbow is a weapon and must be handle with care. Do not shoot against animal or humans.

Here is a video in order to set up the crossbow : string pre-tension and magazine. Note that you I advise to use standard lego string and yellow / black shock absorbers for the power. You can use other but the performance will be not the same.

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