US Army ASEK  Aircrew Survival Egress Knife by Ontario Knife
Company USA.
Features a 1095 Carbon steel blade with hardness of Rc 50-54.
Has serrated edge and sawteeth on spine.The blade is black Zinc phosphate finished and is 4 3/4 inch long.
The one piece molded rubber handgrip has finger guard with spear
holes. The pommel can be used as a glass breaker or a hammer. 
Comes with an ACU digital camo nylon sheath with plastic insert,
that can be attached to a belt or molle to a pack. Overall length is
10 1/8 inch (26.5cm).Good used condition.