Walther P1/38 magazine insert with detent which secures the baseplate. Postwar German production, made by Walther, these work for all P1 and P38 9mm magazines.Part #53 on our Walther P1 schematic.
WALTHER P1 SLIDE STOP RETURN SPRING
WALTHER P1 SPRING FOR TRIGGER
STRAW TAN AK SLING
P38 MANUAL, DIE PISTOLE 38