1. A SELF-PROPELLED WEAPON CARRIER COMPRISING A GUN MOUNTED ON THE CARRIER AND HAVING A GUN BARREL PROTRUDING FROM AND BEYOND THE BODY OF THE CARRIER, AND A RIGID FRAME STRUCTURE SECURED TO THE CARRIER BODY EXTENDING PARALLEL TO THE PROTRUDING PORTION OF THE GUN BARREL SPACED APART THEREFROM, SAID FRAME STRUCTURE HAVING ITS TERMINAL PORTION CURVED UPWARDLY IN FRONT OF THE MUZZLE OF THE BARREL, SAID UPWARDLY TURNED PORTION INCLUDING A CIRCULAR APERTURE ALIGNED WITH THE CENTER AXIS OF THE BORE OF THE BARREL AND HAVING A DIAMETER GREATER THAN THE CALIBER OF THE GUN, SAID FRAME STRUCTURE PROTECTING THE GUN BARREL AGAINST DAMAGE BY COLLISION WITH EXTERNAL OBSTRUCTIONS AND SAID UPWARDLY TURNED PORTION OF THE FRAME STRUCTURE DEFLECTING THE GASES PROPELLED FROM THE BARREL UPON FIRING OF THE GUN SO AS TO NEUTRALIZE AT LEAST PARTLY THE RECOIL MOVEMENT OF THE CARRIER AND TO INCREASE VISIBILITY IN THE ENVIRONMENT OF THE GUN BARREL AFTER FIRING THEREOF.