Hi Folks, I recently bought a Bushmaster O.R.C. and I am in the midst of adding a couple of components to make it more serviceable. One of the most important adds that I am making are the buis. With this particular rifle, I figure I have four options: Mid-length FF hand guard with front sight mounted on hand guard Replacing the milled gas block with a quad rail gas block Installing a non-FF hand guard and mount the front sight on the end(?) Buying the BMAS front sight from BushMaster that attaches to the Milled gas block. Which option would be more efficient? Thanks!!