This SilencerCo Salvo 12 Mossberg 500-style Choke Kit has 3 chokes: improved modified, modified, and full, and fits Mossberg - 500, 535, 590, 930, 9200, Maverick pump, Browning - Invictor, Browning Gold, FN - SLP, P12, H&R - Pardner Pump, Topper Trap, Winchester - Super X 2 and 3, Winchester - 1200, 1300, 1400, 1500, Ranger.