Hi, I hope this is in the correct forum.
I recently purchased a Colt lower marked with the following :
AR-15 COMPETITION HBAR CAL.223 Ser. LCH0014xx.
I have found from searching different forums and the net, that it is from a LE AR6700 ban era rifle.
I have only been able to find 3 different discussions and photos of a lower marked this way. I did a check
at the Colt serial search and no info shows up. My question is this. Does anyone know how many of these rifles were produced? Thanks and any info is appreciated. 
