& Koch AG-C, but with some Army-specific modifications. It includes a folding foregrip and shorter barrel for a more compact package. The sights had to be reconfigured to shoot accurately with the slightly different ballistics from the shorter barrel length. The system was supposed to be lighter than the M203 (it is actually slightly heavier) and does not require specific mounting hardware. Breech loading allows the grenadier to load a shell while keeping the sight on target. It weighs in its base configuration, with the LRF and electronic sight, and with the stock attached. The sights on the M320 are located to the side of the launcher, avoiding the problems that the M203 had with its sight design, which were mounted on top of the launcher and could interfere with the rifle's sights, so they had to be attached separately. This meant two separate operations had to be performed when adding the grenade launcher to the weapon, and since the sights were not integral to the M203, they had to be re-zeroed every time the launcher was reattached to the rifle. The LRF helps eliminate range estimation errors common in shots greater than 100 meters, thus increasing first round hit probability. The M320 can fire all NATO high-explosive, smoke, and illumination grenades. Its breech opens to the side, allowing it to fire a variety of newer rounds which are longer, in particular certain non-lethal rounds, such as Federal Laboratories' "exact impact" (brand name) non-lethal sponge batons or sponge grenades. The M320 operates in double-action mode, with an ambidextrous safety. In case of misfire, the M320 operator merely has to pull the trigger again. The M203 used a single-action mode, which cocks the weapon as the barrel is opened. The M203 operator has to open the barrel by unlocking it and pushing forward to cock the weapon and then re-close the barrel, then pull the trigger again. The problem with this is that in opening the barrel, the grenade is designed to eject and the operator must ensure that it does not fall to the ground. The M320 is one of two 40 mm grenade launchers capable of firing Pike Missile (developed by Raytheon) without modification—the other being the FN EGLM (Enhanced Grenade Launching Module) developed for the FN SCAR. Nonetheless, the weapon's introduction was not without criticism: Soldiers complained about switching from the simple, more streamlined M203 to one with