As an interested bystander, I'll offer this:
There are really only 2 types of bayonet - Blade & Spike.
The variances in those two categories are the fine print for a guy like me. Finish and length for the blades, same for the spikes.
If this could be done with photos and info for each type, I think it would be most informative. Especially if it wasn't scattered through several pages of a thread.
For instance, a post with a photo and physical description/dimensions, then definitive info on the type of rifle, years of issue, etc. These posts should all be grouped together at the top of the thread and all discussion afterwards.
Just my opinion, and worth what you paid for it.