Hi Steve,... I copied the following directly from L&R's website.
The "RPL Line" was developed in answer to tremendous customer demand for quality side lock mechanisms to replace the lower grade locks found on many of the commercial muzzleloaders in today's market place.
Each unit is all American made, by experienced craftsman and backed by the professional service and the reliable parts supply that made L&R famous. These precision built mechanisms include all the features you've come to expect from the Number1 lock manufacturer in the world today. Competition strokes, bearing surfaced internals, rain resistant pans, and rollered frizzens are used in each unit. Each lock is fully capable of providing the speed and reliability you need for a successful hunt or competition.
The booklet included with each unit provides a wealth of information concerning installation , care, cleaning, nomenclature and troubleshooting, the common problems confronted in using the "traditional" ignition systems.
Lock plates drop in but some minor internal wood removal is necessary to accommodate the RPL's heavy duty working parts.The red high-light is mine, not L&R's. :rt th
RPL Locks