BaconCatBug wrote:To answer for those who might still have the same question, additional Dred Klaws grant additional attacks.
"each time the bearer fights, it can make 1 additional attack with each dread klaw it is equipped with."
Note how the rule does not say the likes of "each time a model attacks using this weapon." This means that you are essentially paying for +1 A per dread klaw.
Deff dread has base 2 attacks, which goes up to 4 attacks during fight phase thanks to the two dread klaws it's equipped with. Any additional dread klaws beyond the initial two grants you 1 additional attacks in the fight phase.
If you have 3 dread klaws, you have 5 attacks. If you have 4 dread klaws, you have 6 attacks.