It looks similar (maybe an earlier version) of the Gunslinger adapter to adapt the bolt-on handle (esp. pistol grips) to use with the console.
Abody Manual Shifters Gunslinger
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Point of interest: Gunslinger was bought out by Brewer's. Last I heard, the adapter was no longer available- but ask Dan anyway. If there's enough interest, maybe they would produce another run of them.
