Sorry if this is the wrong place, it was suggested to me that I post this here.

http://imgur.com/a/yC8L7 Multiple views of the bayonet/sword.

http://imgur.com/a/cMCyS More images of the grip.

http://imgur.com/a/Ewhwz Slight concave on the bulge.

Brief History: It was passed down to me from my Grandfather and unfortunately he isn't around anymore to ask about it. I am from the UK and my Grandfather fought in the Korean war, so potentially it could be British or Korean.

PS. Other thread for more information. http://www.reddit.com/r/history/comments/1zq9sy/help_me_identify_this_bayonet_please_reddit_xpost/