Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage

M4 Upper Receiver

Best Sellers
  1. 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
  2. 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
  3. Ar-15 Upper Receiver Assemblies - Upper Receiver W/5.56 Cal, Oracle Barrel Assembly
    Item#:
    231-000-339  
    Our Price:
    $479.00
    Description:
    Easy-To-Swap, Complete, Fully Assembled Top Ends; Carry Handle & Flattop Models; Lots Of Options
  4. Ar-15 Upper Receiver Assemblies - Upper Receiver W/5.56 Cal, Ft, 20" Std Barrel, Parkerized
    Item#:
    231-000-252  
    Our Price:
    $459.99
    Description:
    Easy-To-Swap, Complete, Fully Assembled Top Ends; Carry Handle & Flattop Models; Lots Of Options
  5. Ar-15 Upper Receiver Assemblies - Upper Receiver W/5.56 Cal, Ft, 16" Ap4 Barrel, Parkerized
    Item#:
    231-000-256  
    Our Price:
    $519.99
    Description:
    Easy-To-Swap, Complete, Fully Assembled Top Ends; Carry Handle & Flattop Models; Lots Of Options
  6. Ar-15 Upper Receiver Assemblies - Upper Receiver W/5.56 Cal, Ft, 16" Std Barrel, Parkerized
    Item#:
    231-000-257  
    Our Price:
    $489.00
    Description:
    Easy-To-Swap, Complete, Fully Assembled Top Ends; Carry Handle & Flattop Models; Lots Of Options

View All M4 Upper Receiver »

m4 upper receiver & Accessories

Related Items
  1. 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
  2. Ar-15 Upper Receiver Assemblies - Upper Receiver W/5.56 Cal, A2, 16" Std Barrel, Parkerized
    Item#:
    231-000-253  
    Our Price:
    $499.99
    Description:
    Easy-To-Swap, Complete, Fully Assembled Top Ends; Carry Handle & Flattop Models; Lots Of Options
  3. Ar-15/M16 A4 Upper Receiver - A4 Upper Receiver Assembly
    Item#:
    100-005-851  
    Our Price:
    $129.00
    Description:
    Flattop upper receiver is forged from high-grade 7075 T6 aluminum for strength and durability, then final machined to USGI or better tolerances for building a custom AR rifle. Hardcoat anodized finish minimizes abrasion wear. M4 feed ramp cuts ensure reliable feeding. 13-slot Picatinny rail provides a full 5" for mounting an optic, while the etched position numbers in rail slots ensure repeatability of mounting position. Comes with forward assist and ejection port cover fully assembled and installed. Mfg: Daniel Defense SPECS: 7075 T6 aluminum, Type III hardcoat anodized, matte black. .250" dia. pivot/takedown pin holes.
  4. Ar-15/M16 Modular Upper Receiver - Mur Upper Receiver
    Item#:
    100-004-042  
    Our Price:
    $199.99
    Description:
    Extra Metal For Superb Strength & Rigidity; Mil-Spec Dimensions For Compatibility
  5. Vis Upper Receiver - Vis-2 Mid-Length Upper
    Item#:
    100-004-950  
    Our Price:
    $598.99
    Description:
    Rock Solid Integrated Receiver & Railed Handguard Ensures Alignment Of Rails
  6. Vis Upper Receiver - Vis-1 Carbine Upper
    Item#:
    100-004-949  
    Our Price:
    $569.99
    Description:
    Rock Solid Integrated Receiver & Railed Handguard Ensures Alignment Of Rails

View All M4 Upper Receiver & Accessories »


Ammunition
  1. Handgun Hunting Ammunition - Handgun Hunting .44 Rem Mag 200gr Schp 20 Rnds/Box
    Item#:
    105-053-162  
    Our Price:
    $32.99
    Description:
    A powerful hunting load that stops game dead in its tracks! Originally designed to be the ultimate high performance law enforcement and self-defense handgun bullet, the 100% solid copper hollow-point projectile also meets the critical requirement of stopping power for handgun hunting applications. The 100% solid copper bullet features a six-petal hollow-point specifically designed to deliver tight groups, superior expansion, and increased penetration over jacketed lead-core bullets. Best of all, the one piece design of the solid copper bullet delivers virtually 100% weight retention, even through some of the toughest bone and tissue structure of your favorite thin skinned, big game a Mfg: Magtech Ammunition SPECS: Bullet Style: Solid Copper Hollow
  2. Handgun Hunting Ammunition - Handgun Hunting .454 Casull 225gr Schp 20 Rnds/Box
    Item#:
    105-053-166  
    Our Price:
    $35.99
    Description:
    A powerful hunting load that stops game dead in its tracks! Originally designed to be the ultimate high performance law enforcement and self-defense handgun bullet, the 100% solid copper hollow-point projectile also meets the critical requirement of stopping power for handgun hunting applications. The 100% solid copper bullet features a six-petal hollow-point specifically designed to deliver tight groups, superior expansion, and increased penetration over jacketed lead-core bullets. Best of all, the one piece design of the solid copper bullet delivers virtually 100% weight retention, even through some of the toughest bone and tissue structure of your favorite thin skinned, big game a Mfg: Magtech Ammunition SPECS: Bullet Style: Solid Copper Hollow
  3. Handgun Hunting Ammunition - Handgun Hunting .500 S&W 275gr Schp 20 Rnds/Box
    Item#:
    105-053-173  
    Our Price:
    $56.99
    Description:
    A powerful hunting load that stops game dead in its tracks! Originally designed to be the ultimate high performance law enforcement and self-defense handgun bullet, the 100% solid copper hollow-point projectile also meets the critical requirement of stopping power for handgun hunting applications. The 100% solid copper bullet features a six-petal hollow-point specifically designed to deliver tight groups, superior expansion, and increased penetration over jacketed lead-core bullets. Best of all, the one piece design of the solid copper bullet delivers virtually 100% weight retention, even through some of the toughest bone and tissue structure of your favorite thin skinned, big game a Mfg: Magtech Ammunition SPECS: Bullet Style: Solid Copper Hollow
  4. Cowboy Action Handgun Ammunition - Cowboy Action .357 Magnum 158gr Lfn 50 Rnds/Box
    Item#:
    105-053-134  
    Our Price:
    $28.99
    Description:
    There’s a new sheriff in town! Part of the allure of Cowboy Action Shooting is the chance to step into the past... to experience life the way it used to be when two six-guns and a pair of quick hands were a cowboy’s best friends. Magtech “Old West” Cowboy Action Loads were developed specifically for people like you... Cowboy Action Shooting enthusiasts who know how the West was won and never miss a chance to prove it. “Old West” loads are more than just authentic, they PERFORM! These flat-nose bullets deliver reliable knockdown power that puts steel targets down on the first shot. Superior components and construction assure trouble-free performance Mfg: Magtech Ammunition SPECS: Bullet Style: Lead Flat Nose
  5. Cowboy Action Handgun Ammunition - Cowboy Action .38 Special 158gr Lfn 50 Rnds/Box
    Item#:
    105-053-146  
    Our Price:
    $26.99
    Description:
    There’s a new sheriff in town! Part of the allure of Cowboy Action Shooting is the chance to step into the past... to experience life the way it used to be when two six-guns and a pair of quick hands were a cowboy’s best friends. Magtech “Old West” Cowboy Action Loads were developed specifically for people like you... Cowboy Action Shooting enthusiasts who know how the West was won and never miss a chance to prove it. “Old West” loads are more than just authentic, they PERFORM! These flat-nose bullets deliver reliable knockdown power that puts steel targets down on the first shot. Superior components and construction assure trouble-free performance Mfg: Magtech Ammunition SPECS: Bullet Style: Lead Flat Nose
  6. Cowboy Action Handgun Ammunition - Cowboy Action .44-40 Win 225gr Lfn 50 Rnds/Box
    Item#:
    105-053-158  
    Our Price:
    $37.99
    Description:
    There’s a new sheriff in town! Part of the allure of Cowboy Action Shooting is the chance to step into the past... to experience life the way it used to be when two six-guns and a pair of quick hands were a cowboy’s best friends. Magtech “Old West” Cowboy Action Loads were developed specifically for people like you... Cowboy Action Shooting enthusiasts who know how the West was won and never miss a chance to prove it. “Old West” loads are more than just authentic, they PERFORM! These flat-nose bullets deliver reliable knockdown power that puts steel targets down on the first shot. Superior components and construction assure trouble-free performance Mfg: Magtech Ammunition SPECS: Bullet Style: Lead Flat Nose

View All Ammunition »

Ready to buy M4 Upper Receiver? Brownells.com carries the widest selection at the best prices on the web. Here, you'll find 163 M4 Upper Receiver and M4 Upper Receiver & Accessories, the best available, at prices from $7.95 to $2,599.99. As the internet's top seller of gun parts and gunsmith tools, we're able to bring you the best products, excellent prices, and reliable customer service every day. We're so convinced you'll be happy with all our M4 Upper Receiver 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. Our entire inventory of M4 Upper Receiver is online, so it's easy to find what you need. When you're ready to order, use our simple cart or call us toll-free at 1-800-741-0015. We're passionate about meeting all your needs for gun parts and gunsmith tools, and we're confident you'll find what you need here. If you have any questions, don't hesitate to give us a call!