Remington Model 31 Deluxe, 12 ga. slide action shotgun.   Serial #39457, mfg. 1940.  Good condition.  Interesting military stamped training shotgun from WWII. 26” solid rib barrel has shiny bore, twin beads, 30% original finish turning patina.  2 ¾” chamber, choked IMP CYL.  Barrel serial #39724.  Receiver and trigger guard have 30% finish turning patina.  Target grade receiver has raised rib base, military ordnance, "U.S." and inspector’s mark on left side.  Stock and forearm have very good original finish with slightly worn checkering, correct butt plate and grip cap.  Rear of forearm appears to have been cut down.   Slide action works fine.  Appears to be a WWII trainer for fighter pilots. C&R OK.