Quote Originally Posted by R.A.N.G.E.R View Post
If they’re not using tungsten, but the actual buffers are the same size (C = H1 = H2 = H3 (size)), then do heavier buffers use lead for weights instead of steel?
Carbine buffers are all the same size, but different weights. The H number represents how many steel buffer weights are replaced by tungsten weights - a H2 buffer has 2 tungsten weights and one steel weight.

Rifle buffers are much longer and use steel weights and an aluminum spacer. Generally speaking, rifle buffers are approximately 5.2 ounces and there are no "H" rifle buffers.