The 590 Adapter allows for the installation of the Sidewinder Venom Kit onto 590 Shotguns configured with 20” barrels and 9 shot tubes. The Adapter is threaded for compatibility with the factory magazine tube cap nut.
Please note; use of the Adapter in conjunction with the 20”, 9 Shot 590 requires the purchase of the standard Mossberg 500/88 Sidewinder Kit and NOT the 590 Sidewinder Venom Kit.
Please read our Sidewinder Venom Kit availability update.