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Mk. II A1 Fragmentation Grenade

The 20 oz. Mark II "Pineapple" fragmentation hand grenade was standard issue in the US military from the 1920's through the 1960's. It was used extensively in Vietnam in the early years until supplies were exhausted and was eventually replaced by the M26 and M26A1 hand grenades.

The Mark II had a fuse burn time of 4 to 5 seconds (this difference resulted in some tense situations in the heat of combat) and an effective casualty radius of 10 meters. It could be thrown approximately 30 meters by the average soldier, but could also be fired up to 140 meters from a rifle using the M1A2 projection adapter.

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