This is a complete AR-15 upper chambered for 5.56mm, with a 16" medium-profile barrel of 4140 ChroMoly steel, so the top half of your build arrives assembled. The barrel carries a Melonite finish and...

The Combat Armory Complete Upper is an AR-15 pattern upper chambered in 5.56mm, and it comes with the BCG installed so the heart of the action is already in the upper. Its 16" barrel is 4140 ChroMoly...

This DPMS 11.5" 5.56 Complete Upper is built around an 11.5" barrel of 4150V chrome moly vanadium steel, chambered for 5.56 NATO and rifled with a 1:7 twist. A carbine-length gas system with a...

The DPMS Kitty Kat is a complete upper chambered in 300 Blackout with a compact 7.5" heavy-profile barrel. The 4150V steel barrel has a 1 in 7" twist and a phosphate finish with no chrome lining. A...

This FightLite MCR barrel assembly is a complete 12.5" replacement for MCR rifles and upper receivers, and it also fits Shrike 5.56 rifles and uppers. It is chambered in 5.56 NATO with a 1:7 twist...

This is a complete barrel assembly chambered in 5.56 NATO, built for MCR rifles and for both MCR and Raptor upper receiver assemblies. The barrel is 16.25" long and nitrided, with a 1:7 right-hand...

The Colt Le6933 Eprii Pro Upper 11.5 Hux is a complete upper receiver assembly built around an 11.5" chrome-lined barrel chambered for .223 Remington/5.56 NATO. Designed to drop onto standard AR-15...

The Colt LE6933 EPRII Pro Upper 11.5" SF is a complete upper receiver assembly built for shooters who want Colt’s proven reliability in a compact AR-15 configuration. Chambered for .223 Remington/5...

The Luth-AR M4 Government Profile upper is a complete A3 flat-top upper for an AR-15, built on a 14.50" M4 Government profile barrel in 5.56 NATO. The barrel is made from 4150 steel with a 1:7 twist...

The CMMG ZEROED Banshee MkG suppressed complete upper puts a quiet .45 ACP setup on the Banshee MkG platform in one assembled group. The 6.50" barrel runs an MT contour with a 1:16 twist, a rate well...

The Luth-AR Retro A1 Upper Receiver is an assembled slick-side upper for builders chasing an early-pattern AR-15. It is machined to final dimensions from 7075-T6 aluminum forgings, with correct...

The Gemtech GVAC Upper Group is an AR-15 upper group chambered in 5.56 NATO with an 11.50" barrel. The 5.56 NATO chamber runs both 5.56 NATO and .223 Remington ammunition, so the upper handles range...