Nerf Barrel Extension (Stryfe Only)

This is a Nerf barrel extension I designed for the Nerf Stryfe based off of both ornotermes' and achmed20's designs.
This was designed for the Stryfe and will not fit any other blaster. I am also unsure of the functionality of the rails.

EDIT: There is now a new file which includes picatinny (not nerf) rails on the top and bottom as requested. Due to long print times I have not printed or tested this new design.

FURTHER EDIT: As highlighted in the comments, many people including myself, have had issues with the side rails detaching as I did not attach them properly. I don't think I will get round to fixing this so you will probably have to modify it yourself or use some superglue. Sorry if that is an issue.