The TriStar Viper G2 .410 is a gas-operated, semi-automatic sub-gauge shotgun manufactured in Istanbul, Turkey by Armsan and imported to the United States by TriStar Arms. Introduction of the .410 Bore: The TriStar Viper G2 .410 (widely known in its popular Bronze and Wood configurations) was officially introduced around mid-2018, bringing a soft-recoiling, lightweight semi-automatic option to small-game hunters, youth shooters, and sporting clay enthusiasts