CANVAS BREECH COVER 
PHOTOS BY 
DR. LUC GUILLOU

The canvas breech cover for the Thompson was advertised in Auto-Ordnance catalogs as early as 1920. However, most of the covers that we see today are WWII vintage. The photos shown here are a good example of these covers. I would not recommend their use on any Thompson today.

PHOTO ABOVE SHOWING HOW THE COVER IS USED.