TB 1240-2 GUN, AUTOMATIC, 37-MM, M4 (AIRCRAFT): NON-FUNCTIONING OF FEED MECHANISM. War Dept. (Used) Washington DC: War Dept. January 1943. Soft Cover. 2 page. Very Good. Item #10261 Price: $10.00 See our Home Page before ordering. Add to Cart Ask a Question See all items in Used See all items by War Dept