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If your Stalker is a new, Benelli-style Inertia Drive, I'm pretty sure Browning's your only option ($$$$).
If it's on the older long-recoil action,
www.corsonsbarrels.com only has 24" slug (w/sights) barrels (and 28" bbls); and
www.barrelexchange.com has 24" slug (w/sights) barrels & 26" VR barrels.
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