I don't think they're very effective in semi-auto fire, but you could get the "slant break" common to AKMs.
AK Concepts also makes a 7.62 comp that supposed to be pretty effective.
You can use a '103 break as well (basically a '74 break but with holes be enough to safely shoot 7.62 through), but you'll need to either replace the FSB with a 24mm FSB (preferred) or use an adapter, which usually does work but may wobble quite a bit.