I found a Camillus M4 bayonet for $40. The only problem is, it has plastic handles like a Conetta or Bren-Dan. I read through the "Bayonet Points" chapters on M4 bayonets, but did not find reference to them (Camillus) ever having plastic handles. I do know in 1993, they produced a M4 for commercial sale, and I am guessing that is what it is.
Appreciate any info.