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Ar 15 Upper Receivers

Best Sellers
  1. Sr-15 E3 Mod 2 Upper Receivers M-Lok - Ar-15 Upper Receiver Mod 2 16" Urx 4 M-Lok
    Item#:
    100-023-388  
    Our Price:
    $1,700.00
    Description:
    Knight’s Armament Company, or KAC, is known to many for their top tier, military issued rifles and parts. Brownells is proud to offer this line of Knight’s Armament SR-15 MOD 2 complete upper receivers that allow you to easily complete a build or upgrade a rifle with battle proven quality. Built around a chrome lined, cold hammer forged barrel in your choice of 11.5”, 14.5” 16” & 18” lengths with a Mod 2 gas block, and fitted with a KAC 3 prong QDC suppressor compatible flash hider. The Knight’s Armament SR-15 MOD 2 complete upper receivers feature the URX M-LOK handguards that each have 2 anti-rotation QD sling swivel sockets and ev Mfg: Knights Armament
  2. Sr-15 E3 Mod 2 Upper Receivers M-Lok - Ar-15 Upper Receiver Cqb Mod 2 11.5" Urx 4 M-Lok
    Item#:
    100-023-386  
    Our Price:
    $1,762.50
    Description:
    Knight’s Armament Company, or KAC, is known to many for their top tier, military issued rifles and parts. Brownells is proud to offer this line of Knight’s Armament SR-15 MOD 2 complete upper receivers that allow you to easily complete a build or upgrade a rifle with battle proven quality. Built around a chrome lined, cold hammer forged barrel in your choice of 11.5”, 14.5” 16” & 18” lengths with a Mod 2 gas block, and fitted with a KAC 3 prong QDC suppressor compatible flash hider. The Knight’s Armament SR-15 MOD 2 complete upper receivers feature the URX M-LOK handguards that each have 2 anti-rotation QD sling swivel sockets and ev Mfg: Knights Armament
  3. Sr-15 E3 Mod 2 Upper Receivers M-Lok - Ar-15 Upper Receiver Lpr Mod 2 18" Urx 4 M-Lok
    Item#:
    100-023-389  
    Our Price:
    $1,950.56
    Description:
    Knight’s Armament Company, or KAC, is known to many for their top tier, military issued rifles and parts. Brownells is proud to offer this line of Knight’s Armament SR-15 MOD 2 complete upper receivers that allow you to easily complete a build or upgrade a rifle with battle proven quality. Built around a chrome lined, cold hammer forged barrel in your choice of 11.5”, 14.5” 16” & 18” lengths with a Mod 2 gas block, and fitted with a KAC 3 prong QDC suppressor compatible flash hider. The Knight’s Armament SR-15 MOD 2 complete upper receivers feature the URX M-LOK handguards that each have 2 anti-rotation QD sling swivel sockets and ev Mfg: Knights Armament
  4. Sr-15 E3 Mod 2 Upper Receivers M-Lok - Ar-15 Upper Receiver Carbine Mod 2 14.5" Urx 4 M-Lok
    Item#:
    100-023-387  
    Our Price:
    $1,762.50
    Description:
    Knight’s Armament Company, or KAC, is known to many for their top tier, military issued rifles and parts. Brownells is proud to offer this line of Knight’s Armament SR-15 MOD 2 complete upper receivers that allow you to easily complete a build or upgrade a rifle with battle proven quality. Built around a chrome lined, cold hammer forged barrel in your choice of 11.5”, 14.5” 16” & 18” lengths with a Mod 2 gas block, and fitted with a KAC 3 prong QDC suppressor compatible flash hider. The Knight’s Armament SR-15 MOD 2 complete upper receivers feature the URX M-LOK handguards that each have 2 anti-rotation QD sling swivel sockets and ev Mfg: Knights Armament
  5. Ar-15 5.56 11.5" M4 A2 Upper Kit - Ar-15 5.56 11.5" M4 A2 Upper Kit With Bcg
    Item#:
    100-017-385  
    Our Price:
    $459.99
    Description:
    Bushmaster M4 Upper Receiver Kit, ready to complete your build. Kit includes fully assembled A2 upper receiver, bolt carrier group, handguards and charging handle. Upper features a 11.5” M4 barrel which is machined from 4140 chrome moly steel, chrome lined, has a 1-9 twist, has a front sight base installed on a .750” barrel shoulder, ½-28 muzzle threads and an A2 flash hider installed. Upper receiver has M4 feed ramps, as well as an A2 rear sight. Included complete bolt carrier group has a matte black phosphate finish, is chrome lined and is magnetic particle inspected. All NFA rules apply. Mfg: Bushmaster Firearms Int.Llc.
  6. Ar-15 5.56 16" M4 Upper Kit - Ar-15 5.56 16" M4 Upper Kit With Bcg
    Item#:
    100-017-384  
    Our Price:
    $559.99
    Description:
    Bushmaster M4 Upper Receiver Kit, ready to complete your build.  Kit includes fully assembled upper receiver, bolt carrier group, handguards, charging handle and detachable carry handle.  Upper features a 16” M4 barrel which is machined from 4140 chrome moly steel, chrome lined, has a 1-9 twist, has a front sight base installed on a .750” barrel shoulder, ½-28 muzzle threads and an A2 flash hider installed.  Upper receiver has M4 feed ramps, as well as a detachable carry with rear sight.  Included complete bolt carrier group has a matte black phosphate finish, is chrome lined and is magnetic particle inspected. Mfg: Bushmaster Firearms Int.Llc. SPECS: Fits - AR-15 lower receivers.

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Colt Ar 15 Upper Receivers

Related Items
  1. Carry Handle Upper Receiver, .223/5.56 - Ar6951 Upper Receiver Assembly, Smg 9mm
    Item#:
    160-000-395  
    Our Price:
    $191.99
    Description:
    Stripped Uppers In A2 & Flattop Styles; Genuine Factory Parts
  2. Ar-15 14.5 Complete Upper Receiver - Complete Upper Receiver 14.5"
    Item#:
    160-000-393  
    Our Price:
    $959.99
    Description:
    Add the Colt legend of reliability to you rifle or build with these complete upper receivers from Colt. These are the same upper receivers that can be found on the LE6920, LE6920 SOCOM, and LE6940 model rifles. LE6944CK features a one-piece monolithic upper receiver that has a continuous Mil-Spec rail from the rear of the upper receiver to the front sight and a free floating barrel. LE6944CK has a 14.5” barrel. Includes a charging handle, bolt carrier group, and back up sights. All NFA rules apply. Mfg: Colt
  3. Carry Handle Upper Receiver, .223/5.56 - Ar15a4 Upper Rcvr Assembly, Carbine
    Item#:
    160-302-053  
    Our Price:
    $175.99
    Description:
    Stripped Uppers In A2 & Flattop Styles; Genuine Factory Parts
  4. Ar-15 5.56 Upper Receiver Assembly W/O Front Sight Or Handguard - Ar-15 5.56 Upper Receiver Assembly
    Item#:
    160-000-438  
    Our Price:
    $649.99
    Description:
    Add the Colt legend of reliability to your rifle or build with these complete upper receivers from Colt. The LE6920CK and LE6921CK are based off the combat proven M4 upper receiver and features 1/7 RH twist in a 16.1” barrel on the LE6920CK and 14.5” barrel in the LE6921CK. LE6920CK-NHG and LE6921CK-NHG are the same receiver with the barrel, only they do not include a handguard or front sight. All upper receivers include a charging handle, bolt carrier group, and back up sights. All NFA rules apply. Mfg: Colt
  5. Ar-15 5.56 Upper Receiver Assembly W/O Front Sight Or Handguard - Ar-15 5.56 Upper Receiver Assembly
    Item#:
    160-000-439  
    Our Price:
    $649.99
    Description:
    Add the Colt legend of reliability to your rifle or build with these complete upper receivers from Colt. The LE6920CK and LE6921CK are based off the combat proven M4 upper receiver and features 1/7 RH twist in a 16.1” barrel on the LE6920CK and 14.5” barrel in the LE6921CK. LE6920CK-NHG and LE6921CK-NHG are the same receiver with the barrel, only they do not include a handguard or front sight. All upper receivers include a charging handle, bolt carrier group, and back up sights. All NFA rules apply. Mfg: Colt
  6. Ar-15 5.56 Upper Receiver Assembly W/O Front Sight Or Handguard - Complete Upper Receiver 16"
    Item#:
    160-000-388  
    Our Price:
    $679.99
    Description:
    Add the Colt legend of reliability to your rifle or build with these complete upper receivers from Colt. The LE6920CK and LE6921CK are based off the combat proven M4 upper receiver and features 1/7 RH twist in a 16.1” barrel on the LE6920CK and 14.5” barrel in the LE6921CK. LE6920CK-NHG and LE6921CK-NHG are the same receiver with the barrel, only they do not include a handguard or front sight. All upper receivers include a charging handle, bolt carrier group, and back up sights. All NFA rules apply. Mfg: Colt

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Ammunition
  1. Core-Lokt Ammo 243 Winchester 100gr Pointed Sp - 243 Winchester 100gr Pointed Soft Point 20/Box
    Item#:
    105-202-022  
    Our Price:
    $21.99
    Description:
    Premium Ultra Mag For Serious Hunters There’s probably been more big game shot with Remington Core-Lokts than any other ammunition. For more than six decades, it has remained the leader in centerfire hunting ammunition. One of the first controlled-expansion bullet designs, it’s still one of the most effective ever developed. Its progressively tapered copper jacket is locked to a solid lead core for perfectly controlled expansion and high weight retention. The Pointed Soft Point Core-Lokt (PSPCL) style has a Spitzer-shaped profile for improved velocity and flat trajectory. Mfg: Remington
  2. Core-Lokt Ammo 25-06 Remington 100gr Pointed Sp - 25-06 Remington 100gr Pointed Soft Point 20/Box
    Item#:
    105-202-023  
    Our Price:
    $29.99
    Description:
    Premium Ultra Mag For Serious Hunters There’s probably been more big game shot with Remington Core-Lokts than any other ammunition. For more than six decades, it has remained the leader in centerfire hunting ammunition. One of the first controlled-expansion bullet designs, it’s still one of the most effective ever developed. Its progressively tapered copper jacket is locked to a solid lead core for perfectly controlled expansion and high weight retention. The Pointed Soft Point Core-Lokt (PSPCL) style has a Spitzer-shaped profile for improved velocity and flat trajectory. Mfg: Remington
  3. Core-Lokt Ammo 25-06 Remington 120gr Pointed Sp - 25-06 Remington 120gr Pointed Soft Point 20/Box
    Item#:
    105-202-024  
    Our Price:
    $32.99
    Description:
    Premium Ultra Mag For Serious Hunters There’s probably been more big game shot with Remington Core-Lokts than any other ammunition. For more than six decades, it has remained the leader in centerfire hunting ammunition. One of the first controlled-expansion bullet designs, it’s still one of the most effective ever developed. Its progressively tapered copper jacket is locked to a solid lead core for perfectly controlled expansion and high weight retention. The Pointed Soft Point Core-Lokt (PSPCL) style has a Spitzer-shaped profile for improved velocity and flat trajectory. Mfg: Remington
  4. Core-Lokt Ammo 260 Remington 140gr Pointed Sp - 260 Remington 140gr Pointed Soft Point 20/Box
    Item#:
    105-202-029  
    Our Price:
    $37.99
    Description:
    Premium Ultra Mag For Serious Hunters There’s probably been more big game shot with Remington Core-Lokts than any other ammunition. For more than six decades, it has remained the leader in centerfire hunting ammunition. One of the first controlled-expansion bullet designs, it’s still one of the most effective ever developed. Its progressively tapered copper jacket is locked to a solid lead core for perfectly controlled expansion and high weight retention. The Pointed Soft Point Core-Lokt (PSPCL) style has a Spitzer-shaped profile for improved velocity and flat trajectory. Mfg: Remington
  5. Core-Lokt Ammo 270 Winchester 130gr Pointed Sp - 270 Winchester 130gr Pointed Soft Point 20/Box
    Item#:
    105-202-032  
    Our Price:
    $22.49
    Description:
    Premium Ultra Mag For Serious Hunters There’s probably been more big game shot with Remington Core-Lokts than any other ammunition. For more than six decades, it has remained the leader in centerfire hunting ammunition. One of the first controlled-expansion bullet designs, it’s still one of the most effective ever developed. Its progressively tapered copper jacket is locked to a solid lead core for perfectly controlled expansion and high weight retention. The Pointed Soft Point Core-Lokt (PSPCL) style has a Spitzer-shaped profile for improved velocity and flat trajectory. Mfg: Remington
  6. High Velocity Ammo 22 Long Rifle 40gr Copper Plated Round Nose - 22 Long Rifle 40gr Copper Plated Ro
    Item#:
    105-000-302  
    Our Price:
    $39.99
    List Price: $59.99
    Description:
    Rimfire cartridges made by CI of Mexico. High velocity with non-corosive primers and smokeless powder. Brass cased and copper plated bullets. Each brick contains 500 rounds of rimfire ammuntion, 10 Individual 50 round boxes. Mfg: Ci Ammunition

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So, you're looking for Ar 15 Upper Receivers? Brownells.com carries the widest selection at the best prices on the web. Here, you'll find 150 Ar 15 Upper Receivers and Colt Ar 15 Upper Receivers, the best available, at prices from $54.99 to $4,195.00. Our excellent selection of gun parts and gunsmith tools, along with our unwavering commitment to the best prices and customer service, has made us the number one online retailer in the industry. We know you'll find our Ar 15 Upper Receivers to be everything you expect, so we're proud to offer a 100% satisfaction guarantee. If you're not completely satisfied with your purchase, we'll make it right; whatever it takes. So check out our complete selection of Ar 15 Upper Receivers and place your order online or by calling 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!