The Weaver 48340 No Gunsmith Shotgun Mount is designed for mounting sight devices onto the Remington 870, 1100, and 1187 (12 and 20 Gauge) shotguns. The multi-slot base allows you to mount a variety of optics including scopes, red dots, and laser sights while obtaining the optimum eye relief. Its low profile form fitting design allows you to shoot in your natural position without peeking. This shortgun mount is strong and lightweight and made of tough polymer composite material. It can operate in a temperature range from -40 to 150 F (-40 to 65.55 C). For 12 & 20 Gauge Shotguns (Remington 870, 1100, and 1187) Made in USA