.223 Wylde upper. 16in. Stainless steel 1:8 twist barrel from Classic Firearms in Charlotte. UTG Super Slim M-lock handguard. Magpul mbus sights. Mil-spec receiver, BCG and charging handle. Also has stainless forward assist. I don't remember where I purchased the muzzle brake from. Excellent condition with just about 80-100 rounds through it. Very reliable and accurate. Need the money to fund another build. This upper has a mid-length gas system.