TruGlo Tritium Fiber Optic Brite-Site Handgun Sight For Smith and Wesson M&P TG-TG131MPT. OpticsPlanet is an Authorized US Distributor for TruGlo Gun Parts. The TruGlo Tritium Fiber Optic Brite-Site Handgun Sight For Smith and Wesson M&P - TG131MPT has...