<P> The M67 grenade is a fragmentation hand grenade used by the United States military . The M67 is a further development of the M33 grenade, itself a replacement for the M26 - series grenades used during the Korean and Vietnam Wars, and the older Mk 2 "pineapple" grenade used since World War II . </P> <P> The M67 grenade has a spherical steel body that contains 6.5 oz (180 g) of composition B explosive . It uses the M213 pyrotechnic delay fuze . The M67 grenade weighs 14 oz (400 g) in total and has a safety clip to prevent the safety pin on the grenade from being pulled accidentally . The safety pin prevents the safety lever, or "spoon" on the grenade from moving and releasing the spring - loaded striker which initiates the grenade's fuze assembly . </P> <P> The M67 can be thrown 30 to 35 metres (98 to 115 ft) by the average male soldier . Its fuze delays detonation between 4 and 5 seconds after the spoon is released . Steel fragments (not to be confused with shrapnel) are provided by the grenade body and produce an injury radius of 15 metres (49 ft), with a fatality radius of 5 metres (16 ft), though some fragments can disperse as far out as 250 metres (820 ft). </P> <P> To deploy the M67 grenade, the user first removes the safety clip from the grenade . </P>

How many seconds do you have to throw a grenade