M-61 Frag Grenade. Primary function: Anti-personnel. Dimensions: Length 3.5 in., diameter 2.5 in. Weight: 13.75 ounces. Maximum effective range: Lethal 16 ft., casualty 49 ft. This particular example was manufactured in May 1969. NOTE: grenade pictured is a M-61 Hand grenade, not the M-67 as labeled on the USAF website at the time.
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