Parker made some great hammer guns. However, the lifter you posted is one of the earliest versions that has a hard, sharp angle between the water table and standing breech. These are known for receivers cracking right at that point because the stress is concentrated there. The next version and all subsequent ones had a slight radius at that junction which solved the problem.
Rabbit mentioned the Remington hammergun getting blown up by "Nitro". I know he is aware of it, just forgot to include they were somewhere between double and triple overcharges of Nitro! And it still took several to blow it. The owner was man enough to admit that he made a mistake in the powder hopper. Otherwise, an innocent gun would have been blamed and added to the "unsafe damascus" stories.
