
AR Uppers & Kits
- In StockFAXON ION Ultralight 5.56mm 16in AR-15 Complete Upper Receiver (FX5500-U)Enhanced ambi charging handleMulti-position adjustable gas blockFaxon Gunner lightweight bolt carrier groupFaxon 13" carbon fiber M-LOK handguardFaxon enhanced forged upper receiver5.56 NATO ...10% off$913.17$1,011.08
- In StockGEISSELE AUTOMATICS Super Duty MOD1 5.56mm 16in Black Complete Upper Receivers (08-548B)Designed for 5.56 NATO cartridgesFeatures a 16-inch barrel with a 1:7 twist rate for optimal accuracy and stabilization of bulletsEquipped with a HUXWRX Flash Hider-QD 556Excellent choice for both ...$1,232.94
- In StockCMMG Dissent Mk4 .22 ARC 16.1in Tungsten Upper Receiver Group (28B940C-TNG)Adjustable gas block gives you the freedom to dial in the gas system exactly to your liking1913 Picatinny rail end plateFits mil-spec AR-15 lower receiversCompact Action-Direct impingement ...$1,105.04
- In StockCMMG Resolute Mk3 8.6 BLK 16.1in Armor Black Upper Receiver Group (33BFA0C-AB)ZEROED Mk3 Polymer Dust CoverZEROED AR10/Mk3 Ambi Charging HandleZEROED Muzzle Brake 8.6 BLK CMMG Resolute Mk3 8.6 BLK Upper Receiver Group If you had to describe 8.6 BLK in one word it would ...$896.44
- In StockGEISSELE AUTOMATICS Super Duty Mod1 5.56mm 13.9in DDC Complete Upper Receiver Group (08-546S)13.9in Chrome Lined BarrelSuper Duty Upper with Cam Pin Cut-OutSuper Compact Gas BlockGeissele Stressproof Bolt with Asymmetric Cam Pin12.9in SMR MK16 Rail The GEISSELE AUTOMATICS Super Duty Mod1 ...$1,378.50
- In StockCMMG Bravo AR-15 .22LR Flat Dark Earth Conversion Kit w/ 3 25rd Magazines (22BA651-FDE)Caliber: .22 LRCompatibility: 5.56 / .223 AR Platform RiflesBCG Material: Stainless SteelIncludes: (3) 25 Round Magazines CMMG Bravo AR-15 .22LR Conversion Kit with 3 25rd Magazines Just swap ...$169.99
- In StockCMMG Bravo AR-15 .22LR Flat Dark Earth Conversion Kit w/ 3 10rd Magazines (22BA6AE-FDE)Caliber: .22 LRCompatibility: 5.56 / .223 AR Platform RiflesBCG Material: Stainless SteelIncludes: (3) 10 Round Magazines CMMG Bravo AR-15 .22LR Conversion Kit with 3 10rd Magazines Just swap ...$169.99
- In StockGEISSELE AUTOMATICS Super Duty MOD1 5.56 NATO 14.5in Upper Receiver Group (08-547B)Precision machined, cold hammer forged barrelHUXWRX Flash Hider-QD 556 muzzle deviceGeissele own Reliability Enhanced Bolt Carrier GroupGeissele Stressproof BoltAirborne Charging HandleUpdated ...$1,232.94
- In StockGEISSELE AUTOMATICS Super Duty MOD1 5.56mm 14.5in DDC Complete Upper (08-547S)5.56mm caliberFor the AR-15 platformCold Hammer Forged, chrome-lined barrel and Nanoweapon-coated Reliability Enhanced Bolt Carrier GroupBoth the Geissele CHF barrel and Forged Stressproof Bolt ...$1,378.50
- In StockSpike's Tactical 223 Rem/556NATO 14.5" Mid-length Gas System 12" CRR Quad Rail Complete Upper Receiver (STU5050-CQ2D)Forged Upper Receiver14.5" Mid Length Lightweight BarrelPhosphate M16 Complete BCG Spikes complete upper assemblies will arrive to you inspected, tested, and ready to drop-in and go to work. ...$905.40
- In StockCMMG Dissent Mk4 5.56mm 10.5in Armor Black Upper Group (55B8D86-AB)5.56x45mm NATO caliber10.5" barrelCompact Action-Direct impingement operating systemCmmg 9.6" Proprietary hand guard4140CM, SBN barrel materialPistol gas port locationAdjustable gas ...20% off$1,098.32$1,374.99
- In StockCMMG Dissent 5.7x28mm 6.5in Armor Black Complete Upper Group For AR-15 (57BA8AE-AB)Complete Upper Receiver6.5" Threaded BarrelCMMG Zeroed Linear CompensatorM-LOK Free Float HandguardFits AR-15/CMMG MK57 Lower ReceiverIncludes 1913 Picatinny Rail End Plate The 5.7x28mm ...$1,098.32
- In StockAERO PRECISION M5 308 Win. Assembled Flat Dark Earth AR Upper (APAR308505A)M4 Feedramps.2795 takedown pin holes (DPMS size)DPMS High Profile (.210) TangIncludes port door and forward assistAccepts standard DPMS .308 componentsMachined from 7075-T6 forged aluminum$182.09
- In StockAERO PRECISION AR15 5.56mm Stripped Black AR Upper (APAR501603C)M4 Feedramps.250 takedown pin holesLazer engraved T-marksMachined from 7075-T6 forged aluminumWorks with standard AR15/M16 components16% off$87.76$104.99
- In StockAERO PRECISION M4E1 Assembled Upper Receiver (APAR700201AC)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 holesLazer ...15% off$135.72$159.99
- In StockAERO PRECISION AR15 M4E1 Enhanced Anodized Black Upper Receiver (APAR600201AC)M4 Feedramps.250 takedown pin holesLazer engraved T-marksComes assembled, with dust cover and forward assist installedHandguard mounting platform is forged into the receiverCompatible with Aero ...12% off$176.30$199.99
- In StockDANIEL DEFENSE DDM4 V7 5.56mm 16in Barrel Black Upper Receiver (23-128-02339-047)UPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps; CNC Machined of 7075-T6 Aluminum, Type III Hard Coat AnodizedBARREL: Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:7 Twist, 16" ...$1,174.00
- In StockSpike's Tactical Flat Top Upper w/Ejection Port Door, 9MM, Black Finish SFT902D7076 T6 ConstructionShell DeflectorEjection Port Door Spikes Tactical's mission is simple, Spikes strives to build the highest quality products and offer them at the best possible price to the ...$105.01
- In StockNordic Components NC15 Extruded Stripped Upper, Fits AR15, Blk Finish, Upper Receiver Eliminates Dust Cover/Forward Assist, Compatible with Milspec BCGs/Charging Handles/Barrels/Most Handguards, Flat Top Picatinny Rail, 7029-T6 Alm, 10oz NC15-UR-EXTDust cover, forward assist, and brass deflector omittedCompatible with standard AR15-spec bolt carrier groups, charging handles, and barrelsFlat-top Picatinny rail accommodates mounting optics or ...$94.63
- In StockRadical Firearms Complete Upper Assembly, 223 Rem/556NATO, 16" Barrel, 1:7 Twist, Black, MLOK Handguard, A2 Flash Hider RF00325Free float rail systemForged 7075 T6 AluminumType III Anodizing The Radical Firearms 5.56mm upper is a complete MIL-STD upper ready to drop on any MIL-STD lower Receiver. Perfect for the novice ...$416.39
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.