M16 Bolt Carrier Group
alpha has some BCGs on sale and some barrels and LPKs.
they have the standard m16 style BCG for $119 and the MPI for $130. good prices compared to 6 months back.
only thing is these have ceramic coatings --don't know if it is instead of or over chrome on the inside of the carrier.
i don't see how ceramic would be better than chrome--but it might be goods enough.
they also have some barrels on sale mostly 8" and 10.5" 300BOs--
you can get free shipping with a $150 order just enter 'freeship150" i