I have a couple of PSA AR-47's. We videoed the bolt running a standard 3oz buffer. No bolt bounce reviewing it in slow-mo. I did step up to a 6.1oz buffer. It still functioned fine shooting Tula, the felt recoil stepped up with the Wolf Mil-spec still not as bad as with the 3.0

Anyone swap in an AR10 buffer spring? I picked up some Kaw Valley 9mm/.308 springs.