Shop STNGR AR-15 complete upper receiver assemblies. Complete uppers are a quick and easy way to upgrade your rifle without having to hire a gunsmith. Just pop out your AR-15s pivot and takedown pins, remove your factory upper, drop your new STNGR AR15 complete upper into your lower receiver and like ACDC, you're ready to rock and roll. It really is that simple. All of our AR 15 uppers are individually assembled by hand and test fired to ensure high performance.
Each AR 15 upper assembly includes a STNGR M-Lok handguard, 223 Wylde barrel (this hybrid chamber allows you to shoot both 5.56 NATO and 223 Remington caliber ammo), billet upper, low profile gas block, gas tube, flash hider, and a charging handle and bolt carrier group (BCG).
All parts are proudly made in the USA, backed by our legendary Lifetime SWARM Warranty and come with free shipping! With over 8,000 reviews and counting, it's no wonder our AR-15 parts and accessories are relied on by everyone from competitive shooters to SWAT teams. See for yourself what makes STNGR different and Join the Swarm!