Answer:
"Rights" may not be the appropriate term. A beneficiary has a "claim" to the estate, arising from their inclusion in the will. Anyway, to get to your question, a beneficiary should be given a copy of the will, so that they may view their entitlement, and the entitlement of all the other beneficiaries. Also, the Executor should contact you and inform you of their progress administrating the estate. As a beneficiary, you may have legal recourse if you do not think the Executor is administrating the estate correctly.