With all due respect, your guess would be wrong, Robert. The Abiells I have seen are direct copies of good old Regis Darne R patent guns, and every one has appeared to be a better quality copy of same. Course, that may/may not be the case here. I seem to remember the name being spelled "A'Baille", but, I might be wrong there.
Charlins are indeed, good quality, but, completely different in design and function, lacking the breech to barrel extension lockup and toggle driven wedge lockup of a Darne, which, as I've posted 'bout a jillion times, makes an R Darne my favorite, but, who cares?
Beagledog, you don't know me from Adam, and if you choose to ignore this advice, I can't blame you, but, I'd advise you to stop attempting any at home gunsmithing on this wonderful old gun. The fact that you are here asking questions points out in no uncertain terms you are in over your head, and I have handled far, far too many sliding breech guns that have been f *&%$d up by amature gunsmithing-that is not an understatement. Further, you don't hire a Checker cab mechanic to work on a Testarossa, so, if you are interested further, I can name a few gunsmiths that are qualified to put the gun back in service. At the top of the list would be Kirk Merrington, English trained, expensive, and worth every single penny, and Keith Kearcher comes to mind as well-do a google search, and you will find them.
Proceed further if you wish, but, I am at a point in life where I don't even tell people how to work on a sliding breech gun anymore. Parts are handfitted, expensive, and mostly not available, so keep that in mind if and when you tackle that project.
Good Luck.
Best,
Ted
