Well if you had actually built and fired a gun with the barrel back in the forend then you would already know that the empty barrel channel will get stained black/grey with powder residue and lead buildup. You would know how ugly that is, along with how wrong it looks to extend the forend past the muzzle. Nobody does it so its become a standard thing to make sure the forend doesnt extend past the muzzle. It looks wierd and causes issues like staining and the potential to trap debris that could be struck by a bullet. Your "legitime" questions arent getting answered because of this. The dry firing thread is not worthless if you actually read the posts but I understand some people on this forum just dont have time for that. And FWIW LEOs are trained to measure OAL along the centerline of the bore from muzzle to butt. That came from another member who was so-trained. On top of that, once an LEO asks to inspect your firearms you are at his/her mercy. If they say its not legal than the guns get confiscated, your vehicle can be searched and confiscated and you can even be arrested and charged if you cant prove them wrong. Its their word against yours and you are not paid to enforce laws. Roll the dice