Hello all. I found this piece of steel on an abandoned Air Force Bombing range in southern Arizona in proximity to many pieces of exploded ordinance (schrapnel). It would appears to be some kind of snap-in magazine but I have not seen anything like it before. It is approx. 2" long x 1" wide x 1.75" tall. It is stamped SA on the bottom inside 2 full circles with radiating partial circles out toward the edge. It has a raised button and a squared detent on either side. It is slightly tapered from bottom to top. Can anyone help with an ID on this. Thanks Oz
