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M4 Upper Receivers

Best Sellers
  1. Ar-15/M16 Upper Receivers - 12.5" Ar Upper 300 Blk
    Item#:
    276-000-021  
    Our Price:
    $1,080.00
    Description:
  2. Ar-15/M16 Upper Receivers - 16" Ar Upper 300 Blk
    Item#:
    276-000-011  
    Our Price:
    $1,080.00
    Description:
  3. Ar-15/M16 Upper Receivers - 16" Ar Upper 5.56
    Item#:
    276-000-043  
    Our Price:
    $1,080.00
    Description:
  4. Ar-15/M16 Evo Ultralite Upper Receivers - Evo Ultralite Upper, Carbine-Length
    Item#:
    100-009-250  
    Our Price:
    $888.99
    Description:
    Complete Piston System In A Super-Light Package
  5. Ar-15/M16 Tactical Elite Piston Upper Receivers - Gas Piston Upper Receiver, Pistol
    Item#:
    100-005-990  
    Our Price:
    $735.00
    Description:
    Ready To Install To Make A Reliable, Clean Running Piston Carbine Or Pistol
  6. Ar-15/M16 Base Piston Upper Receivers - Gas Piston Upper Receiver, Midlength
    Item#:
    100-009-248  
    Our Price:
    $611.83
    Description:
    Ready To Install To Make A Reliable, Clean Running Piston Rifle

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m4 upper receivers & Accessories

Related Items
  1. Ar-15/M16 Base Piston Upper Receivers - Gas Piston Upper Receiver, Carbine
    Item#:
    100-005-989  
    Our Price:
    $588.99
    Description:
    Ready To Install To Make A Reliable, Clean Running Piston Rifle
  2. Ar-15/M16 Tactical Elite Piston Upper Receivers - Gas Piston Upper Receiver Tac Elite, Mid-Length
    Item#:
    100-013-536  
    Our Price:
    $799.99
    Description:
    Ready To Install To Make A Reliable, Clean Running Piston Carbine Or Pistol
  3. Ar-15/M16 Tactical Elite Piston Upper Receivers - Gas Piston Upper Receiver Tac Elite, Carbine
    Item#:
    100-013-534  
    Our Price:
    $777.99
    Description:
    Ready To Install To Make A Reliable, Clean Running Piston Carbine Or Pistol
  4. Ar-15 Upper Receiver Assemblies - Ar15 20" Tactical Precision Upper Assembly 1-9
    Item#:
    231-000-345  
    Our Price:
    $699.00
    Description:
    Easy-To-Swap, Complete, Fully Assembled Top Ends; Carry Handle & Flattop Models; Lots Of Options
  5. Ar-15 Upper Receiver Assemblies - Ar15 16" Tac2 Upper Assembly 1-9
    Item#:
    231-000-346  
    Our Price:
    $699.00
    Description:
    Easy-To-Swap, Complete, Fully Assembled Top Ends; Carry Handle & Flattop Models; Lots Of Options
  6. Vis Upper Receiver - Vis-3 Rifle Upper
    Item#:
    100-004-948  
    Our Price:
    $645.99
    Description:
    Rock Solid Integrated Receiver & Railed Handguard Ensures Alignment Of Rails

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Ammunition
  1. Remington Sts 12ga Ammo Case - Premier Sts 12ga 2-3/4" 1-1/8oz Light #8 Shot Case
    Item#:
    105-000-327  
    Our Price:
    $89.99
    Description:
    Premier® STS shells are the most reliable and consistent shells you can shoot, but with premium-quality components Hard lead shot in a variety of load weights to give an optimum balance of velocity and comfortable recoil. Now available in case quantites. Mfg: Brownells
  2. Winchester Military 12ga Ammo Case - Military Grade 12ga 2-3/4   9 Pellet #00 Shot 50/Case
    Item#:
    105-000-324  
    Our Price:
    $59.99
    Description:
    Winchester Military grade production overruns. Loaded with nine #00 pellets of buckshot in Grex buffering. Feature an OD Green hull with a high base anodized head. 50 Shells per case. Mfg: Brownells
  3. Hornady Custom 223 Rem Sp Ammo Case - Custom .223 Rem 55gr Sp 500/Case
    Item#:
    105-000-325  
    Our Price:
    $289.99
    Description:
    The Hornady BTSP is part of the InterLock series of bullets from Hornady. It features an aerodynamic secant ogive for a flat, streamlined trajectory resulting in pinpoint accuracy. A tapered jacket helps provide deep penetration with controlled expansion while a lead alloy core adds strength and durability. The InterLock ring locks the core and jacket together. cartridge cases are brass, boxer primed and re-loadable. Muzzle velocity is 3240 fps based on a 24 inch barrel. Hornady products provide consistent quality, accuracy and performance and are designed, manufactured and tested with state of the art equipment under the highest standards of quality assurance. Mfg: Brownells
  4. 7.62 Pmag And Imi Ammo Value Pack - 100 Rounds Imi 7.62x51 With 5 Pmags Value Pack
    Item#:
    105-000-320  
    Our Price:
    $179.99
    Description:
    Buy (5) Gen3 Magpul PMAG’s for your AR-10/SR-25 with 100 Rounds of 7.62x51 and save over $40! Your ammo is less than $0.46 per round for IMI 7.62x51 (308) with these savings. You will NOT find 7.62x51 cheaper anywhere in this market! Mfg: Brownells
  5. Wolf Gold 223 Rem Fmj Ammo Can - Wolf Gold .223 Remington 55gr Fmj 500 Round Ammo Can
    Item#:
    105-203-234  
    Our Price:
    $229.99
    Description:
    500 Rounds of Wolf 223 Remington with 55gr Full Metal Jacket (FMJ) bullets for high-volume shooting. This Wolf ammo is made for reliable ignition in adverse conditions. Lead core bullets. This is boxer primed brass cartridge case ammunition that is re-loadable. Equivalent to M193 ammunition. Conveniently priced to where it won’t hurt your pocket book – quite a change from what’s been on the market lately! Mfg: Brownells
  6. Wolf Polyformance 7.62x39mm Hp Ammo Can - Wolf Polyformance 7.62x39mm 123gr Hp 500 Round Ammo Can
    Item#:
    105-203-232  
    Our Price:
    $139.99
    List Price: $169.99
    Description:
    500 Rounds of Wolf 7.62x39mm with 123gr HP bullets for high-volume shooting. This Wolf ammo is made for reliable ignition in adverse conditions. Steel cased non-corrosive ammo paired with a dual latch, waterproof ammo can. Hollow Point ammunition with Berdan primed steel cases that are not re-loadable. Conveniently priced to where it won’t hurt your pocket book – quite a change from what’s been on the market lately! Mfg: Brownells

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Looking to buy M4 Upper Receivers? Count on Brownells.com to provide the best selection and prices every day. With 119 M4 Upper Receivers and M4 Upper Receivers & Accessories in stock ranging in price from $59.99 to $2,299.99, you'll find all the best choices available. As the number one online retailer of gun parts and gunsmith tools, we'll provide excellent customer service, great prices, and top-quality merchandise every day. We're so convinced you'll be happy with all our M4 Upper Receivers that we offer a 100% customer satisfaction guarantee. If you're not completely satisfied with your purchase let us know so we can make it right. When you find the M4 Upper Receivers that are right for you, it's easy to place your order online or over the phone at 1-800-741-0015. As always, we're here to help meet all of your needs for gun parts and gunsmith tools, so if you don't find what you're looking for online, drop us a line and let us know.