Guntec USA is an American manufacturer of firearm parts and accessories, serving customers since 1989. The company says its AR-15, AR-308, and AR 9mm products are made in Scottsdale, Arizona. Its broad catalog includes barrels, bolt carrier groups, charging handles, gas blocks and tubes, handguards, muzzle devices, upper and lower parts, receivers, stocks, and stock components. Customers can also find complete kits, pistol accessories, magazines, sights, slings, and tools.

Guntec USA offers products for a range of builds, from individual components to complete rifle and pistol kits. Its featured items include AR-15 build kits, handguards, buffer components, flash cans, and decorative accessories in various anodized colors. The site also highlights new products, weekly specials, promotional products, and branded merchandise. Buyers can browse by platform or category, locate a dealer, inquire about becoming a dealer, or place wholesale orders. Guntec USA is based at 15545 N 77th Street in Scottsdale, Arizona, and provides customer support by phone and email.