Cory...Its a long model standard dress bayonet. They came in your length and a shorter model. Any military branch carried them. They are a common item to find today because there were lots made.Krebs used two or three makers marks. Dont know of hand which one this was (early or later).

Never argue with an idiot, he will only drag you down to his level and beat you with experience. And remember the early bird gets the worm, but the second mouse gets the cheese.