OK been doing some reading on bayos and wanted to see if I have this right.
Aside from the obvious rarity of the original Colt bayo they seem to me like they would fall in this order, with the top of this list being possibly the harder to find.?
Frazier MFG.
Conetta
Imperial
Mil-Par
BOC
General Cutlery
Ontario Knife
Thanks for any input in advance.

I have a colt marked "Colt's 62316, Hartford Conn, USA" - didn't think it was very rare as picked it up this year online from a surplus site - they did not list a manufacturer... just came that way. Ordered a second one - came Conetta. Would like to know if I just lucked out?
I am pretty sure that BOC made the most M7's of any maker, IIRC they made 1.8 million from the late '60's through the '70's. I think Imperial made the second most.
ETA: Mike, yes, you lucked out on getting the Colt. I wouldn't say they are rare, but they are less common than most. Nice score.

Excluding the early Colt's the FZR is probably the hardest and most valuable/rare to find today. Was a time when these were fairly abundant but finding one in excellent condition was still a challenge. As stated above the Colt 62316 and the Eickhorn Colt 62316 are probably next on the list at least for value. I see most the other mfgs in various conditions whenever I look at a bayonet lot, so plenty of these were made. There are some pretty rare variations from these manufacturers but I personally think most of these were prototypes that never actually went much farther than military testing and were sold on the surplus market.
The BOC and Imperial usually are the least expensive and most common. A few variants of the Mil-Par and Gen-Cut so they seem to have been under contract for a longer period of time. Conetta seems abundant in excellent condition in my area but may be worth a couple coins more elsewhere. The Ontario appears to be modern manufacturing procerss to early spec style and was a very quality piece for the coins 10-15 yrs back.
As we know the early Colt's stand high on the pedestal for all US Military bayonets in value and rarity even considering the M-7 flavor and the M-7 in general not really being considered very collectible in the knife world. Too many M-7 bayos were produced and excellent condition examples still exist to ever really be considered rare. Possibly in time they may become some what collectible but it remains to be seen.