Mk 40 Mod 0/1 

Is there any more information on this ordnance?  I've searched the ammo data sheets for grenades, and it is not listed . . . even as obsolete ordnance.  I can't find it in any manual of any US armed service.  It is not listed in the comprehensive OrdData database.  I was assigned to NSWCOM for four years (through '96) and never heard of any SEAL there using such a grenade.  I have the suspicion that the reference (Dockery) may have gotten this wrong.  Is there any actual original military source data on this grenade?  Or are we just relying on second hand war story details from a hooah book?
98.255.89.22