Fighting Knife converted from a US WW1 P17 Bayonet
The conversion have been done very well
The blade and muzzel ring have been ground down
Button has been removed and filled 
Its housed in a metal scabbard which has been cut down to fit the blade
 
Blade measures 7 inches    
 
Hard to find item and this example is in very good condition - see pictures
 
Over 18 only - you will need ID to buy this item