# Quad Defense > Custom built Night Vision trusted by professionals. We build to-order systems with white phosphor tubes, premium housings, and combat-proven optics. Built for warfighters. Backed by our 5-year warranty. Free shipping on orders $2K+. Enter Darkness. Quad Defense is an online store at https://quaddefense.com, powered by Shopify. ## Browse - All products: https://quaddefense.com/collections/all - Search: https://quaddefense.com/search?q={query} ## Store Information - Currency: USD - Contact: sales@quaddefense.com - Phone: 704-709-9141 ## For Agents & Developers This store supports the Universal Commerce Protocol (UCP) for programmatic commerce. - Agent instructions: https://quaddefense.com/agents.md - UCP discovery: https://quaddefense.com/.well-known/ucp - MCP endpoint: https://quaddefense.com/api/ucp/mcp - Sitemap: https://quaddefense.com/sitemap.xml ## Platform This store is built on Shopify (https://www.shopify.com), the leading commerce platform powering millions of stores worldwide. Start your own store: https://www.shopify.com/start