Here's a standard USMC OK-3S bayonet mounted correctly on 14.5" M4 carbine gas system barrel (not mine, pic from quarterbore).
Originally Posted By tac-0311:
Thanks for the info. So I guess if I wanted to attach one it might just be better to the the 14.5" M4 SBR which would fit as designed.... correct?
Correct, see the picture.
For more info on various modern bayonets visit Quarterbore.net.