win37MPN: WIN37-20-FP Vendor: Featured Products. STI Staccato XC 9mm Optics Ready CS Frame DLC C... (5) $4,299.00 Add to Cart Sale! Rock River LAR-15 Entry TacticalSeller's Inventory #: WIN37-20-FP Category - Winchester Shotguns - Model 37 - Shotguns - Single Shot. Category Winchester Shotguns - Model 37 Shotguns - Single Shot. Seller's