Stumbled across a nice bayonet, with a sheath. Pulled it out, low and behold it says USA on it!
M9
PHROBIS III
U.S.A.
Pat Pend
Upon a quick phone search, I see there are different generations of these.
Are these worth anything?
Crappy phone pics:
Yes, they are worth good money.
Originally Posted By mak0:
In good shape it's worth about $100
Awesome, thanks alot guys

I recommend you keep it and not sell it because the Phrobis III were made by Buck and are the best made of the M9's (over Ontario and Lan-Cay) and only gain in value. There are several generations of the M9 (looks like you most likely have a Gen 4) there are collectors of these blades but I have would hang on to it unless you want to get rid of it. I just noticed one go for about $300.00 on an auction site. Anyway here is some information for you.
http://www.m9bayonet.com/buck-phrobis-m9.html
http://www.old-smithy.info/bayonets/m9_bayonet_and_variations.htm