Yes, adding weight to the BCG or anywhere in the recoil system will keep the bolt in battery longer and slow down the cyclic rate. These are usually good things when you want to save brass or run a little faster load. David Tubb makes a carrier weight system that drops in a AR-15 or AR-10 bolt carrier for that very reason. I have one in my .308 and it does help, especially when shooting suppressed.
Last edited by wareagle700; 10/04/15.
