Tungsten goes a long way.  With one tungsten and two steel weights, our USA H1 buffer aids in feeding and slows down the cyclic rate on your AR platform.
 
AR15 / M16 Buffer – H1 Heavy Weight
 
Fits all standard AR15/M16 carbine buffer tubes.
Weight: 3.8 oz.
Manufactured to mil-spec dimensions.
Hard coat anodized.
100% USA Made