Joe, in the world of gun description, acronym and shorthand and terms particular to firearms abound.

SLE - sidelock ejector
SLNE - sidelock non-ejector
BLE - boxlock ejector
BLNE - boxlock non-ejector

All hammer guns I have seen are sidelocks; i.e., A type of action on a break-open gun where the lockwork (hammer, sear, mainspring etc.) is mounted to the back side (inside) of a plate (or pair of plates for a double gun).

Other actions would be boxlock or trigger plate, and www.hallowellco.com has the best description of these terms in the "Firearms Dictionary" on its site.

Regards, Tim

Last edited by Tim Carney; 01/16/16 02:36 PM.