The F1 grenade is a defensive fragmentation grenade, designed to be thrown in cover and at range in close quarter situations as this grenade will fragment upon explosion, sending hundreds of hot shrapnel flying at different directions. The F1 has an even bigger damage output and radius than the RGD-5 so one should not be surprised if the grenade wounds the player at ranges where one is safe from an RGD blast.
The real world F1 grenade is very close in design to many western style grenades, especially the British 36M Mills Grenade, despite the F1's soviet origins. Although the grenade only has 60 grams of TNT compared to the RGD-5's 110 grams, the outer shell of the grenade is ribbed for extreme shrapnel dispersion, making this a very deadly weapon to infantry.
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