06-28-2011, 02:25 AM
warped Wrote:I was referring to the carrier weights and that sort of stuff, 9mm buffers are not meant to be used in a gas operated rifle.
Laugh as much as you like, it does not mean it is right to do use heavier than specified carriers or buffers.
M16 carriers should be the only ones used really, it is how the rifle was meant to run.
Humm not exactly... I helped a guy fix his problematic SBRed AR 7.5" 5.56 with a 9mm buffer along with a upgraded extractor. Now it runs great They also work great with, well 9mm uppers. It's a bold statement to say don't run heavy anything with out risk of ruining your AR. The worst that will happen is that it will short stroke and not strip and chamber the next round which effectively creates a single shot. Its better to run a heavy buffer system than one that is too light. A light system will give you a higher ROF but risk damaging your bolt and double feeding/jamming. Grendel owners are not concerned with a high ROF anyways. A slightly slower BCG can only make your system more reliable and can actually improve your accuracy if your current rig is slamming the bolt violently.
A good rule of thumb is if you brass is getting slung out at the 4:00 to 6:00 position (barrel being 12:00) your BCG velocity is too fast and should be slowed down a tad. Many Grendel owner put their G6.5 upper on their 5.56 lower without considering the buffer. Something to think about...
One last thing, the military runs H1 and H2 buffers in their M4s along with F/A carriers....