Thompson parts are rare as is but this is a part for the collector as it is a non-stocked item. In other words this is Thompson part made for M/T's own projects not a catalogue part anyone might buy. There are many ways it can be used and if you call I'll share why it was originally cast. This is great part to set your build apart from the cookie cutter boys. * I'm holding this, sale pending* 33o-844-637o ,Dan