WATCHTOWER Firearms is an American firearm manufacturer which got the inspiration for their company name from the brave American soldiers who participated in Operation Watchtower. Their AR-15 components are a great way to optimize your rifle, and the Type 15 Complete Lower Receiver makes an excellent base for your next build project. This complete lower starts with a billet lower receiver which is machined from 7075-T6 aluminum. Premium parts are installed in the receiver including an ambidextrous safety selector and Hiperfire trigger to take this lower several steps above everyday mil-spec parts. Available in a variety of finishes, the Type 15 Complete Lower is multi-caliber marked and makes an excellent foundation for a variety of calibers including 5.56 NATO, .300 Blackout and more.