TruGlo Longbead Shotgun Sight - Green Mossberg 5-40 Base TG-TG947DGM. OpticsPlanet Inc is an Authorized US Distributor for TruGlo Tritium & Fiber Optic Night Sights. Please note: TG947UR / TG947UG includes thread adapters for 6-48 / 3-56 / 2.6mm / 5-40...