Philip Luty was an English anti-gun control activist notable for the production of homemade firearms and manuals providing instruction in the same.

Luty designed several firearms, including four sub-machine gun designs. Of these, one particular design, outlined in his book Expedient Homemade Firearms, is the best known. This design makes extensive use of easily procured materials such as folded sheet metal, bar stock, washers, and hex screws. It is a simple blowback-operated sub-machine gun and made from entirely craft-produced components, including the magazine and pistol grip. The major drawback of such designs is the lack of rifling in the barrel, which results in poor accuracy and limited range.