Airsoft M4 stock

I created this for a friend that managed to break off the stock guide rails off his M4 body. But then other people wanted the stock for a non broken M4, so new mount and here we are.

The stock uses 4 M4x20 mm screws + nuts to attach the stock to the mount. And there is a hole for a 4 mm set screw under the buttpad if extra security is needed for it to not fall off while playing.

There is also a hole for a 8 mm threaded rod to be inserted into the stock part for extra strength.

Edit: Updated with pic of the stock on the airsoft gun in question.