AR-18 carbine variants created by the original Armalite firearms manufacturer. As far as I know, none of these ever went beyond the prototype stage. This picture found its way into the second edition of my The AR-15/M16 Rifle Sourcebook published by Paladin Press. Before "going digital" I used pen and ink to create my technical drawings, turning out two a day (if I really pushed it); today doing this type of drawing on computer averages around one firearm per hour, thanks in large part to most manufacturers building different models on a central receiver chasis. Thus the first version of a rifle might take several hours to draw, but the subsequent models can be cut and pasted with unique parts drawn, cutting time to around half an hour per gun. For my books I generally put related pictures into groups (like the page as shown here). Then these pictures are send on CD along with the captions and text of my manuscript to the publisher. I knew I was on the right tract when another publisher asked me where in the world I was obtaining my photos of rare firearms; he was floored when I told him they were simply drawings. This drawing was created in Corel Photo-Paint 8 using magazine photos as references for the proper scaling of the components.