O Ok I am working on a MA-10 6.5x47 and I am trying to figure out which bolt and barrel extension to use. A DPMS pattern bolt will need to have the firing pin hole bushed to fix the primer cratering problem. The Armalite pattern has the right size firing pin hole but if I use an Armalite bolt/extension will the DPMS style handguard still work? I'm thinking it will but I want to make sure before I get a bunch of parts together that don't fit.