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Welcome to the Forum from (northern) South Texas!
There are several folks here who are quite knowledgeable about working on the 1877's. There is an active thread right now in the Colt Revolvers section.
www.coltforum.com
Good luck with yours!!
There are several folks here who are quite knowledgeable about working on the 1877's. There is an active thread right now in the Colt Revolvers section.

1877 Lightning Repair
The cylinder stop arm should have a slight bend to it. When you pull the trigger the stud lifts the cylinder stop up which allows the cylinder to rotate. At a certain point the cylinder stop arm needs to slide off the trigger stud, which let's it lock the cylinder in place. I also find...
Good luck with yours!!