boxlock

A FLINTLOCK or percussion firearm with the firing mechanism mounted centrally on the stock.
Found on http://www.encyclo.co.uk/visitor-contributions.php

boxlock

A flintlock or percussion firearm with the firing mechanism mounted centrally on the stock.
Found on http://www.antique-marks.com/antique-terms-b.html

Boxlock

A type of action (receiver) for a break-open gun where the lockwork is contained within a box-shaped housing. (see also: Sidelock). A boxlock is superior to a sidelock because although more metal needs to be removed from the action body, less wood needs be removed from the head of the stock---and wood is generally more vulnerable than metal. The An...
Found on http://www.hallowellco.com/abbrevia.htm
No exact match found