
AR Uppers & Kits
- Out Of StockCMMG Upper Group Resolute Mk4 6mm Arc 16.1" Armor Black (60B1091-AB)Precise manufacturinglong term reliabilityDurable construction16.1" Barrel6mm ARCComplete upper assemblyCerakoted Armor Black Meet CMMG's newest long-range offering. Chambered in Hornady's ...$719.37
- Out Of StockCMMG Banshee Mk4 .22LR 9in Armor Black Upper Group (22B8F8B-AB)The upper group is built on the Mk4 platformIt is designed to work with any standard AR15 lower group and use Cmmg's .22LR AR Conversion Mags9" barrelUpper receiver: billet 6061 T6 ...$582.09
- Out Of StockCMMG Resolute Mk4 300BLK 16.1in Armor Black Upper Group (30B12BB-AB).300 AAC Blackout caliberThis upper is designed to work with any standard AR15 lowerDirect impingement operating system4140CM, SBN barrel materialCarbine gas port locationCmmg EML15 M-lok hand ...$719.37
- Out Of StockCMMG Banshee Mk4 300BLK 12.5in Armor Black Upper Group (30B8A6F-AB).300 AAC Blackout caliber12.5" barrelDirect impingement operating system4140CM, SBN barrel materialPistol gas port locationCmmg EML11 M-lok hand guardMk4 Zeroed parts and accessories - ...$719.37
- Out Of StockCMMG Resolute Mk3 .308Win 16.1in Armor Black Upper Group (38B7D78-AB).308/7.62x51mm caliber16.1" barrelDirect impingement operating systemCmmg EML15 M-lok hand guard416SS, SBN barrel materialRifle gas port locationMk3 Zeroed parts and accessories - Quality ...$1,028.68
- Out Of StockCMMG Banshee Mk3 .308Win 12.5in Armor Black Upper Group (38B92D0-AB).308/7.62x51mm caliber12.5" barrelDirect impingement operating systemCmmg EML11 M-lok hand guard4140CM, SBN barrel materialMid gas port locationMk3 Zeroed parts and accessories - Quality ...$985.81
- Out Of StockCMMG Banshee Mk4 4.6x30mm 8in Armor Black Upper Group (46B965A-AB)4.6x30mm caliber8" barrelDirect impingement operating systemCmmg EML7 M-lok hand guard4140CM, SBN barrel materialMicro gas port locationCerakote standard finishLifetime Quality Guarantee ...$679.40
- Out Of StockCMMG Banshee Mk4 5.56x45mm Nato 10.5in Armor Black Upper Group (55B8D53-AB)5.56x45mm NATO caliber10.5" barrelDirect impingement operating systemCmmg EML9 M-lok hand guard4140CM, SBN barrel materialCarbine gas port locationCerakote standard finishLifetime Quality ...$679.40
- Out Of StockCMMG Banshee Mk4 5.56x45mm Nato 12.5in Armor Black Upper Group (55BDFF4-AB)5.56x45mm NATO caliber12.5" barrelDirect impingement operating systemCmmg EML11 M-lok hand guard4140CM, SBN barrel materialCarbine gas port locationCerakote standard finishLifetime Quality ...$719.37
- Out Of StockCMMG Resolute MK4 6.5 Grendel 16.1in Armor Black Upper Group (64BCF88-AB)ZEROED AR15 Polymer Dust CoverZEROED AR15 Ambi Charging HandleZEROED Muzzle Brake 6.5mm Designed to be a flat shooting round at medium to long ranges, 6.5 Grendel offers efficient ballistic ...$719.37
- Out Of StockCMMG Endeavor MK3 6.5 Creedmoor 20in Armor Black Upper Group (65B149C-AB)ZEROED .308 Ambi Charging HandleZEROED Mk3 Polymer Dust CoverZEROED Muzzle Brake 6.5mm Long-range rifle builds don't have to be cumbersome, with a barrel length of 20" this 6.5 Creedmoor ENDEAVOR ...$1,071.54
- Out Of StockCMMG Dissent 9mm 10.5in Armor Black Upper Group (99B80E4-AB)Compact Action-Radial Delayed BlowbackCMMG ZEROED Linear CompensatorDISSENT 9mm 7075 T6 AluminumCMMG 9.6" Proprietary HandguardDISSENT Side Charger - Left What can we say? Some of you just ...$1,198.97
- Out Of StockAERO PRECISION AR15 5.56 16in Complete Upper Receiver with Pinned FSB (APAR502505M65)16" barrel chambered in 5.56 NATOPinned front sight gas blockMid-Length gas systemMagpul MOE SL M-LOK handguardA2 flash hiderFlat Top M4 upper receiverForged aluminum to Mil-Spec The AERO ...$304.80
- Out Of StockCMMG 300BLK 16.1in Hardcoat Anodized Black Upper Group For Dissent Mk4 (30B125B-HCA)The forward non-reciprocating side charger allows for quick bolt operation without coming off targetAll DISSENT Upper groups include a 1913 Picatinny rail end plate to use in place of the lower ...$1,119.04
- Out Of StockCMMG 9mm 10.5in Hardcoat Anodized Black Upper Group For Dissent (99B80E4-HCA)Patent pending Compact ActionRadial Delayed Blowback technology with fixed ejectorDISSENT upper group houses the entire action and recoil assembly in the upper receiverThe forward ...$1,079.07
- Out Of StockNOVESKE Chainsaw 5.56mm 16in Complete Upper (3000523)416R stainless steel barrels with Noveske match chambersNoveske marked gas blocks and forward assistsRadian Raptor LT charging handlesPhosphate coated bolt carriers and boltsGEN 4 NSR free ...7% off$1,169.99$1,259.99
- Out Of StockNOVESKE Chainsaw 5.56mm 10.5in Mlok Complete Upper (3000529)Hand polished Noveske Match ChamberCarbine length gas tube system1/2"x28 muzzle threads with an A2 birdcage flash hiderHardcoat type III anodizingBlack nitride Noveske marked forward ...2% off$1,116.25$1,139.99
- Out Of StockCMMG Dissent 9mm 16.1in Anodized Black Upper Group (99B9A0B-HCA)Complete Upper Receiver Assembly7075 T6 Aluminum ConstructionCompact Action-Radial Delayed Blowback Operating SystemCMMG 15in Proprietary Handguard16.1in Barrel1/2x28 Muzzle ThreadingCMMG Zeroed ...$1,119.04
- Out Of StockNOVESKE Chainsaw 300blk 10.5in Complete Upper With Packaging (03000527)Individual serialized barrel for QC purposesHand polished 300 Blackout ChamberPistol Length gas Tube systemNoveske Marked Low profile .750 journal Gas Block, pinned to BarrelM4 barrel extension ...2% off$1,116.25$1,135.99
- Out Of StockAERO PRECISION M4E1 Threaded Kodiak Brown Assembled Upper Receiver (APAR700222AC)New enhanced forging that gives the upper receiver a "billet look"New picatinny profile that blends seamlessly with the Enhanced and ATLAS Series HandguardsM4 Feedramps.250 takedown pin ...$159.99
If we compare parts of an AR with body parts, the upper receivers are undoubtedly the heart. As you might know, this assembly of components is indispensable for making the shooting process possible. Not that lower receivers play a minor role in that shooting play, but AR upper receivers house the components responsible for crucial steps of the firing process. Unlike lower receivers, they are not considered legal firearms and thus won’t cost you any extra paperwork. At the same time, a different upper AR receiver can turn your firearm from a close quarters carbine to a long-range precision rifle. Upper receivers are the most customizable part of ARs, so the choice is ample.
AR Uppers can be classified according to different characteristics, but the one we consider most relevant for customization enthusiasts is the degree of completeness. Some people prefer their upper complete, while others opt for stripped variants. The difference is on the surface: if an upper receiver is stripped, it includes only the main piece of metal that houses other components. A complete upper receiver will have the ejection port and the forward assist button installed. In case you don’t want to trouble yourself with gathering all the components, you can get an upper receiver assembly. It’s a complete, ready-to-be-fired system that includes a charging handle, barrel, handguards, and bolt carrier group. The only thing you’ll need to shoot is to attach it to a lower receiver.
GritrSports.com is a gun store dedicated to giving our customers the widest choice possible. Here, we have dozens of upper receivers for sale. You can find them in whatever configuration you might need, be it stripped, complete, or a whole assembly. Choose from a wide selection of products manufactured by such brands as Aero Precision, Anderson, ATI, CMMG, Daniel Defense, POF, Spikes Tactical, and many others.
Complete your AR build or make a long-awaited upgrade when you shop AR uppers at GritrSports.com.