6mm ARC Uppers – Complete AR-15 Upper Assemblies
6mm ARC Uppers – Complete AR-15 Upper Assemblies
Shop 6mm ARC uppers for AR-15 platforms, available in multiple barrel lengths and configurations. Designed around the 6mm Advanced Rifle Cartridge, these uppers bring high-BC 6mm projectile capability to the AR-15 platform for hunting, target shooting and longer-range applications. Explore complete 6mm ARC upper assemblies for your next setup and pair with the appropriate bolt, magazines and AR-15 lower receiver.
What bolt does a 6mm ARC upper use?
6mm ARC typically uses a 6.5 Grendel Type II-pattern bolt with the appropriate bolt-face dimensions. Always match the bolt to the barrel and manufacturer specifications to ensure proper compatibility.
-28%
AR-15 6MM ARC 16" MLOK UPPER ASSEMBLY WITH SLIP OVER BARREL SHROUD
Perfect for your next build, this 16" MLOK Upper Assembly is designed to give your AR-15 a sleek, ve..
-33%
AR-15 6mm ARC 20" Black Nitride Upper Assembly – 15" M-LOK, A2 Flash Hider
The Moriarti AR-15 6mm ARC 20" Black Nitride Upper Assembly combines the long-range ballistic capabi..
-45%
AR-15 6mm ARC 20" Hexagon Fluted Stainless Steel Upper Assembly – 15" M-LOK
The Moriarti AR-15 6mm ARC 20" Hexagon Fluted Stainless Steel Upper Assembly combines match-grade ba..
-38%
Moriarti Armaments AR-15 18″ 6MM ARC Stainless Upper Assembly - Quad, A2
The Moriarti AR-15 6mm ARC 18" Stainless Steel Upper Assembly combines precision-oriented barrel con..
RADIAN UPPER 14.5
The Radian Weapons is a complete upper receiver in 6MM ARC with a 14.5" barrel. Key details Brand:..
RADIAN UPPER 14.5
The Radian Weapons is a complete upper receiver in 6MM ARC with a 14.5" barrel. Key details Brand:..
RADIAN UPPER 14.5
The Radian Weapons is a complete upper receiver in 6MM ARC with a 14.5" barrel. Key details Brand:..
RADIAN UPPER 14.5
The Radian Weapons is a complete upper receiver in 6MM ARC with a 14.5" barrel. Key details Brand:..
RADIAN UPPER 18
The Radian Weapons is a complete upper receiver in 6MM ARC with an 18" barrel. Key details Brand: ..
RADIAN UPPER 18
The Radian Weapons is a complete upper receiver in 6MM ARC with an 18" barrel. Key details Brand: ..
RADIAN UPPER 18
The Radian Weapons is a complete upper receiver in 6MM ARC with an 18" barrel. Key details Brand: ..
RADIAN UPPER 18
The Radian Weapons is a complete upper receiver in 6MM ARC with an 18" barrel. Key details Brand: ..
RADIAN UPPER 18
The Radian Weapons is a complete upper receiver in 6MM ARC with an 18" barrel. Key details Brand: ..
RISE CMPLT UPPR 6MM ARC 18
The Rise Armament is a complete upper receiver in 6MM ARC with an 18" barrel. Key details Brand: R..
CMMG UPPR RSLT MK4 6MM ARC 16.1
The CMMG Resolute MK4 is a complete upper receiver in 6MM ARC with a 16.1" barrel. Key details Bra..
NOVESKE N4 AFGHAN UPPER 6ARC 14.5PW
The Noveske N4 Afghan is a complete upper receiver in 6MM ARC with a 14.5" barrel. Key details Bra..
NOVESKE N4 OG UPPER 6ARC 12.5 BLK
The Noveske N4 OG is a complete upper receiver in 6MM ARC with a 12.5" barrel. Key details Brand: ..
NOVESKE N4 SPR UPPER 6ARC 18
The Noveske N4 SPR is a complete upper receiver in 6MM ARC with an 18" barrel. Key details Brand: ..
RADIAN UPPER 14.5
The Radian Weapons is a complete upper receiver in 6MM ARC with a 14.5" barrel. Key details Brand:..
RISE CMPLT UPPR 6MM ARC 18
The Rise Armament is a complete upper receiver in 6MM ARC with an 18" barrel. Key details Brand: R..