The standard issue weapons for U.S. soldiers in Vietnam included the M16A2 rifle, M1911 pistol, and M61 fragmentation grenade. The M16A2 was the most common rifle, firing 5.56mm rounds with effective range of 300 meters. The M1911 pistol had an effective range of 75 yards and 7 round capacity. The M61 grenade had a casualty radius of 15 meters and incorporated a "Jungle Clip" safety feature to prevent accidental detonation in dense foliage.