The 16" carbines take a Colt bayonet with a spacer on it. Only a true Colt collector would have one.
The sleeve on the newer C8A3/FTHB/SFW has two uses. One is so that you can mount the M203 with Diemacos god awful quick detach mount. The other, not so well known use, is to increase the barrel diameter so that a bayonet will fit the barrel properly. I don't know why since only a couple of inches stick out past the barrel.
So in the CF, 20" and 14.5" mount properly. The 15.9" with simon sleeve works too, but barely.
So what is CSOR doing since they put a different sleeve on it so they can run the OPS can. I heard they just switched over to Surefire.



























