I feel silly starting a thread for something so small but I'm looking to buy three tungsten weights for AR-15 buffers. I have an H1 buffer and an SR15 buffer. With three weights I should be able to make both of them into H2 buffers (one for the H1 and two for the SR15). I would prefer not to have to buy whole buffer assemblies because they're not cheap and would leave me with extra buffers I don't want. Where can I buy three little tungsten buffer weights? Bonus points if shipping's free.