Originally Posted by Sprint
From your desciption, it appears the mainspring guide rod head has broken. This is not uncommon with this part. They usually broke after years of use due to the material hardening and becomming brittle. There are all steel parts available out there somewhere but cannot remember where.
Numrich Gun Parts Corporation has schematics of many H&R handgun models that will help you in repairing the revolver.
Sprint, thank you so much, I will try to find an all steel replacement, I'm so surprised plastic materials were used.
. Thank you again.
One more question, as long as I'm taking this apart, are there any other parts that I should thing about replacing as I fix this old gun?