www.ammoclip.com/R/remington_51.htm
Remington's website has what you are looking for.
Yes, that would be the Model 51 made in 380 and 32 auto.
Click on the link below for photo Model 51
Remington never made a model 380 rifle, no model number even resembling that in 22.This is from Remington's page for semi-auto rimfires...Mohawk 10CModel 16Model 24Model 241Model 550Model 550-1Model 552Model 522 ViperModel 597Nylon 66Nylon 77
for scarce magazines contact: edssportshop.com
Usually not. The 9mm Parabellum catridge is longer than the .380, as a result, a 9mm magazine is also bigger, and the magazine will not fit in the .380 magazine well.
Areas to look at - ammunition, magazine, feed ramp, cleanliness
The Remington Model 51 pistol was not made by Walther. Has nothing to do with Walther. See the link at the right for a reproduction manual. sales@countrygunsmith.net
No
It's an inspection mark. If your interested in more information about the Model 51 there is a survey currently being conducted for them on the Remington Society of America under current research.
Model 51 manual located here - http://stevespages.com/pdf/remington_51.pdf
http://stevespages.com/ipb-remington-51.html