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The RGO Impact Grenade is a Russian fragmentation device that features an impact-sensitive fuse as its primary detonator. This is in contrast with time-delay fuses such as that seen on the American M67, and similar to devices like the common 40mm grenade. A secondary time-delay fuse ensures the grenade explodes about four seconds after it is armed. It is otherwise similar in construction to a typical hand grenade.
— Battlelog description
The RGO Impact grenade is introduced in Battlefield 4 as one of many options for the player's kit. Upon spawn the player gets 2 Impact grenades, which is most likely because it takes 2 to kill an uninjured opponent. The name Impact grenade is a bit misleading, as the grenade actually detonates almost a second after impacting a solid surface, which makes this grenade perfect for hitting enemies on top of roofs as it's possible to throw the grenade so that it hits the spot where the wall meets the rooftop, then bounces up right into the enemies face. Grenade throws like this are impossible to avoid because the RGO detonates literally right as it bounces up over the ledge, dealing the maximum 80 damage to the opponent. It can be problematic to hit an enemy with the second grenade however, as they're likely to run away or at least back away from the ledge after they take damage. But if the enemy has taken any more than 20 damage the player can kill them with just one grenade, provided they get it close enough.
- After the release of the Fall Update, players now carry only 1 Impact and also the blast radius has been slightly decreased.