Dear DPMS-why don't you guys offer a chromed version of your M-4 Upper with Mikulek Compensator?? I don't see anything in chromed bores in the catalog you sent me. By the way-thanks for the FREE catalog-I don't know why folks are complaining about them not being free!! I recently got a New DPMS Lower-so if you ever offer chromed bores, please let us all know!!! And yes-chromed bores do make a difference-they are a lot easier to clean. I have a Bushmaster DCM rifle, and a few other models-all with chromed bores. The DCM, however, does not have a chromed bore and it takes forever to get a patch to run clean through it!!!!!