My Account (Sign in)

Your basket is empty.

Basket

Help and contact

Free standard delivery over £199

100-day return policy

Brownells UK - World's Largest Supplier of Gun Parts, Gunsmith Tools & Shooting Accessories

My Account (Sign in)

Shopping list

(0)

Basket

Shop
Schematics
Manufacturers

Newsletter

Sale

Firearms
Rifle Parts
Handgun Parts
Shotgun Parts
Magazines
Reloading
Shooting Accessories
Gunsmith Tools
Optics & Mounting
Gun Cleaning & Chemicals
—
—
—

Over 300,000 customers - we say thank you!

4.93/5 "Very good" (1400+ reviews)

40,000+ products for hunting and shooting sports

Home Rifle Parts Receiver Parts Receivers Upper Receivers Support

Upper Receivers

Restrict search

Products
Bestseller
Top rated
Sale
New

Filter by: then

Filter by:

Sort by:

Display per page: 20 40 60

Page: 1 2 3 4 5 ... 10 < >

Upper Receivers - Products

1 - 20 of 183 results

Page: 1 2 3 4 5 ... 10 < >

AERO PRECISION

AERO PRECISION 5.56MM ASSEMBLED UPPER RCVR NO AUTO SEAR CUT FOR AR-15 FDE
AR-15 UPPER RECEIVER ASSEMBLED NO AUTO SEAR CUT

Upper Receivers

The Aero Precision AR-15 Upper Receiver is designed without an auto sear cut for legal use in Europe and complies with standard AR-15 specifications.
This upper receiver is fully assembled with an ejection-port cover and forward assist, and features M4-style feedramps and .250-inch takedown pin holes.
Constructed from 7075-T6 aluminum, it is available in black or flat dark earth anodized finishes and is chambered for 5.56 mm NATO cartridges.

In stock - Is a 'Call to order' product.

£199.90 £179.90 - £199.90

Upgrade your firearm with the BRN-180® Gen 2 Upper Receiver Assembly! 🔥 Enjoy improved reliability and versatility with a piston system.

BROWNELLS

BROWNELLS BRN-180 GEN 2 16" 7.62X39MM UPPER RECEIVER ASSEMBLY
BRN-180® GEN 2 COMPLETE UPPER RECEIVER ASSEMBLY

Upper Receivers

The BRN-180® Gen 2 Complete Upper Receiver Assembly features an adjustable gas system and a single locking screw handguard for improved reliability and ease of maintenance.
It is compatible with standard mil-spec AR-15 lower receivers and offers a .223 Wylde chamber for versatility with ammunition types.
The assembly includes a 16" barrel with a matte black Nitride finish, a replica 3-prong AR-180 flash suppressor, and is designed for the 7.62 x 39 mm cartridge.

In stock - Is a 'Call to order' product.

£1,199.90 £1,159.90 - £1,329.90

AERO PRECISION

AERO PRECISION M5E1 ENHANCED 308 WINCHESTER ASSEMBLED UPPER RECEIVER FDE
M5E1 ENHANCED UPPER RECEIVERS

Upper Receivers

The M5E1 Upper Receiver integrates the handguard mounting platform for a strong and lightweight one-piece design, requiring only 8 screws for a free-floated handguard.
It includes M4 Feedramps, .2795 takedown pin holes, and comes assembled with a dust cover and forward assist, ready for easy installation.
Designed specifically for use with Aero Precision M5 Enhanced Handguards, the upper receiver will not work with other AR10/308 handguards.

In stock - Is a 'Call to order' product.

£319.90 £294.90 - £319.90

Discover the BRN-180S Upper Receiver with pinned & welded flash hider. Get the shortest barrel without SBR registration! 🔥 Perfect for .223 Wylde.

BROWNELLS

BROWNELLS BRN-180S GEN 2 13.9" UPPER RECEIVER PINNED/WELDED .223WYLDE
BRN-180S UPPER RECEIVERS WITH PIN & WELD FLASH HIDER

Upper Receivers

In stock - Is a 'Call to order' product.

£1,159.90

Explore the BRN-180S® Gen 2 Complete Upper Receiver Assembly! 🔥 With a 10.5" barrel, it's perfect for reliable performance and customization.

BROWNELLS

BROWNELLS BRN-180S GEN 2 10.5" 223 WYLDE UPPER RECEIVER ASSEMBLY
BRN-180S® GEN 2 COMPLETE UPPER RECEIVER ASSEMBLY

Upper Receivers

The BRN-180S® Gen 2 Complete Upper Receiver is a short configuration with a 10.5" barrel chambered in 223 Wylde, designed for flexibility with .223 Rem and 5.56 NATO ammo.
It features an improved Adjustable Gas System for reliable performance with different ammo and suppressor setups, and a new handguard locking mechanism for better alignment and rigidity.
Constructed with a machined 7075 T6 aluminum receiver and handguard, the system includes a replica AR-180 flash suppressor and is compatible with mil-spec AR-15 lowers.

In stock - Is a 'Call to order' product.

£1,159.90

SONS OF LIBERTY GUN WORKS

SONS OF LIBERTY GUN WORKS BROADSWORD BILLET STRIPPED UPPER RECEIVER BLACK
BROADSWORD BILLET UPPER RECEIVER

Upper Receivers

In stock - Is a 'Call to order' product.

£479.90

Discover the BRN-180 16" Gen 2 Upper with MI Alpha Series Folding Stock. 🔥 Enhance your shooting experience with its reliable piston system!

BROWNELLS

BROWNELLS BRN-180 16" GEN 2 UPPER W/ MI ALPHA SERIES FOLDING STOCK
BRN-180 16" GEN 2 UPPER REC W/ MI ALPHA SERIES FOLDING STOCK

Upper Receivers

The BRN-180® Gen2 Upper Receiver has an adjustable gas system and a new single locking screw handguard mechanism for improved reliability and maintenance.
It is compatible with standard mil-spec AR-15 lower receivers and features a 16" 4150 carbon steel barrel with a .223 Wylde chamber and a Nitride finish.
The ALPHA Series Folding Stock is adjustable, made from high-strength materials, and includes multiple sling attachments, enhancing the firearm's versatility and user comfort.

In stock - Is a 'Call to order' product.

£1,379.90

Build your dream rifle with the M5E1 6.5 Creedmoor Upper Receiver! 🛠️ Lightweight, accurate, and ready for your custom parts.

AERO PRECISION

AERO PRECISION M5E1 6.5 CM ASSEMBLED UPPER FLUTED 22" RIFLE THREADED BLACK
M5E1 6.5 CREEDMORE ASSEMBLED UPPER RECEIVER W/GEN 2 HANDGUARD

Upper Receivers

The M5E1 Complete Upper features a 22" 6.5 Creedmoor fluted stainless steel barrel, a Gen 2 Enhanced Handguard with quick disconnect sling sockets, and is forged from 7075 T6 aluminum.
This upper receiver does not include a BCG (Bolt Carrier Group) or Charging Handle and is equipped with a .308 A2 Birdcage Flash Hider.
It has a 1/8 twist rate, utilizes a rifle length gas system, and is compatible with standard AR .308 components, with a black anodized finish.

In stock - Is a 'Call to order' product.

£1,069.90 £969.90 - £1,069.90

Upgrade your AR-15 with the ARAK-21 7.62x39 Upper Receiver! 🚀 Easy to install, durable, and packed with features for optimal performance.

FAXON FIREARMS

FAXON FIREARMS ARAK-21 12.5" 7.62X39 COMPLETE UPPER RECEIVER BLACK
ARAK-21 7.62X39MM COMPLETE UPPER RECEIVER

Upper Receivers

In stock - Is a 'Call to order' product.

£1,499.90

AERO PRECISION

AERO PRECISION M5 308 WINCHESTER 16" BBL ASSEMBLED UPPER RECEIVER BLACK
M5 308 WINCHESTER ASSEMBLED UPPER RECEIVER

Upper Receivers

In stock - Is a 'Call to order' product.

£759.90

Discover the BRN-180S® 300BLK Upper with Vortex SPARC SOLAR Red Dot 🌟. Enhanced reliability and performance for your shooting needs!

BROWNELLS

BROWNELLS BRN-180S 300BLK UPPER W/SPARC SOLAR RED DOT
BRN-180S® 300BLK UPPER WITH VORTEX SPARC SOLAR RED DOT

Upper Receivers

The BRN-180S® 300BLK Upper features an adjustable gas system and a short stroke gas piston, ensuring reliability with various ammo types, especially in its shorter configuration for 300 Blackout rounds.
It includes a robust, Nitride-finished 4150 carbon steel barrel with a 1-8 twist rate, and a unique three-prong flash hider that minimizes dust signature when shooting prone.
The Vortex SPARC SOLAR Red Dot is equipped with an Auto D-TEC system that switches between solar and battery power, offering a 2 MOA dot with a long battery life of 60,000 hours and motion activation capability.

In stock - Is a 'Call to order' product.

£1,409.90

AERO PRECISION

AERO PRECISION M5 (.308) ASSEMBLED UPPER RECEIVER THREADED OD GREEN
308 AR M5 UPPER RECEIVER

Upper Receivers

The Aero Precision M5 308 Upper Receiver is precision machined from 7075-T6 aluminum and is compatible with DPMS pattern 308 components.
It features M4 feedramps, a matte black hard coat anodized finish, and comes with a forward assist and ejection port cover installed.
The upper receiver is finished in O.D. Green, fits DPMS high profile handguards, and weighs 14.1 oz.

4.3

In stock - Is a 'Call to order' product.

£264.90

AERO PRECISION

AERO PRECISION AR-15 STRIPPED UPPER RECEIVER NO AUTO SEAR CUT
AR-15 STRIPPED UPPER RECEIVERS

Upper Receivers

Aero Precision offers stripped AR-15 upper receivers without the auto sear cut, suitable for semi-automatic builds and compliant with certain country regulations.
The upper receivers can be purchased with or without a forward assist and are compatible with standard AR-15 or M16 bolt carriers.
These uppers feature M4 feedramps, mil-spec picatinny rails, and are finished with a matte black hard anodized coating.

In stock - Is a 'Call to order' product.

£159.90 £159.90 - £164.90

Transform your AR-15 for hunting with the BRN-180 350 Legend Upper Receiver! 🦌 Lightweight, reliable, and optimized for 350 Legend ammo.

BROWNELLS

BROWNELLS BRN-180 16" UPPER RECEIVER 350 LEGEND
BRN-180 350 LEGEND 16IN COMPLETE UPPER RECEIVER ASSEMBLY

Upper Receivers

The BRN-180 350 Legend is a fully self-contained upper receiver group compatible with AR-15 lower receivers, designed for easy setup for hunting.
Features a piston operating system, optimized feed ramps for 350 Legend cartridges, and an AR-180 inspired gas system with accessible maintenance.
Includes a 16-inch lightweight nitride barrel with MLOK handguard for accessories and recommends dedicated 350 Legend magazines for best performance.

In stock - Is a 'Call to order' product.

£1,249.90

KE ARMS

KE ARMS WWSD 223 REM UPPER RECEIVER 16" EURO EDITION NO AUTO SEAR
KE ARMS WWSDE 223 REMINGTON UPPER RECEIVER

Upper Receivers

The KE ARMS WWSDE 223 Remington Upper Receiver is Europe compliant, featuring a 223 Wylde chamber and a semi-auto bolt carrier, precision machined from 7075-T6 forgings.
It includes a 16" Midlength Gas System Pencil Profile barrel with Nitride Finish, a Slick M16 Chrome Complete Bolt Carrier Group with HMB Bolt, and a Breek Ambidextrous Charging Handle.
The upper receiver comes with a 15" Carbon Fiber Rail System, providing 8 MLOK slots on 7 sides and 5 on top, and has a total weight of 3.45 pounds with the handguard.

In stock - Is a 'Call to order' product.

£1,069.90

Upgrade your rifle with the M5E1 308 Winchester Upper Receiver featuring a Gen 2 Handguard. 🔥 Precision-crafted for performance and style!

AERO PRECISION

AERO PRECISION M5E1 308 WIN ASSEMBLED UPPER FLUTED 18" RIFLE THREADED BLACK
M5E1 308 WINCHESTER ASSEMBLED UPPER RECEIVER W/GEN 2 HANDGUARD

Upper Receivers

The M5E1 Complete Upper includes a Gen 2 Enhanced Handguard with quick disconnect sling sockets and a new picatinny top rail profile.
It features an 18" .308 Winchester fluted stainless steel barrel or a 22" 6.5 Creedmoor fluted barrel, both with rifle length gas systems and A2 flash hiders.
The upper is precision machined from 7075 T6 aluminum, but does not come with a BCG or Charging Handle.

In stock - Is a 'Call to order' product.

£1,039.90 £1,039.90 - £1,069.90

New

LMT DEFENSE

LMT DEFENSE MRP-L M-LOK SHOVELNOSE 5.56MM 11.5" ASSEMBLED UPPER RECEIVER
MRP-L M-LOK SHOVELHEAD 5.56MM ASSEMBLED UPPER RECEIVER

Upper Receivers

In stock - Is a 'Call to order' product.

£1,039.90

NORDIC COMPONENTS

NORDIC COMPONENTS 22RB 22LR 16" UPPER W/HANDGUARD, BOLT SAVER & 10RD MAG
22RB DEDICATED 22 LONG RIFLE UPPER RECEIVER

Upper Receivers

The Nordic Components 22RB is a dedicated .22LR upper receiver that converts AR-pattern lowers for .22LR shooting.
It is built with the same materials as standard AR15 rifles, providing an authentic centerfire rifle look and feel.
This complete upper comes with a 16" match contour barrel, handguard, bolt saver, and a 10-round magazine.

Reordered - Is a 'Call to order' product.

£769.90

Explore the BRN-180S GEN 2 Complete Upper Receiver! 🔥 Lightweight, reliable, and perfect for 223 Wylde ammo. Upgrade your AR-15 today!

BROWNELLS

BROWNELLS BRN-180S GEN 2 14.5" 223 WYLDE UPPER RECEIVER BLACK
BRN-180S"! GEN2 13.9/14.5 223/5.56 COMPLETE UPPER RECEIVER ASSY

Upper Receivers

The BRN-180S® Gen 2 is a complete upper receiver assembly designed for compatibility with AR-15 lower receivers and is ideal for use with folding stocks or rear picatinny adapters due to its self-contained recoil system.
It features a 223 Wylde chamber for broad ammunition compatibility, a free-float MLOK handguard, and a piston operating system for reliability, with two gas settings for suppressed or unsuppressed firing.
The upper receiver and handguard are machined from 7075 T6 aluminum with a hardcoat anodized finish, and the product includes a 14.5" nitride finished barrel with a 1-8 twist, but does not come with a muzzle device.

Reordered - Is a 'Call to order' product.

£919.90

AERO PRECISION

AERO PRECISION M4E1 ENHANCED 5.56MM ASSEMBLED UPPER RECEIVER FOR AR-15 BLK
AR-15 M4E1 ENHANCED UPPER RECEIVER

Upper Receivers

The Aero Precision M4E1 Enhanced Upper Receiver features an integrated handguard mounting platform, forged directly into the 7075 T6 aluminum upper receiver.
This upper receiver comes with M4 feed ramps, laser engraved T-marks, and a hard coat anodized finish, ensuring compatibility and durability.
It is designed to accept standard AR-15/M16 components and includes the necessary barrel nut and wrench for assembly.

Not available - Is a 'Call to order' product.

£269.90

Page: 1 2 3 4 5 ... 10

Display: 20 40 60

Show 20 more results (Page 2)

1 - 20 of 183 results

Page: 1 2 3 4 5 ... 10 < >

Categories
- Rifle Parts
  - Receiver Parts
    - Receivers
      - Barreled Receivers
      - Lower Receivers
      - Rifle Receivers
      - Upper Receivers
Restrict search
- Make
- Model
- Manufacturer
- Special Filters
  - Made in USA (318)
- Price
  - -
- Style
- Length
  - 1.75'' (1)
  - 10'' (8)
  - 10.3'' (10)
  - 10.5'' (12)
  - 11'' (2)
  - 11.5'' (15)
  - 11.85'' (3)
  - 12'' (2)
  - 12.5'' (6)
  - 12.75'' (1)
  - 13.25'' (2)
  - 13.7'' (2)
  - 13.9'' (5)
  - 14.5'' (23)
  - 15.3'' (1)
  - 16'' (62)
  - 16.1'' (6)
  - 16.25'' (2)
  - 17.5'' (2)
  - 18'' (25)
  - 18.5'' (1)
  - 20'' (7)
  - 22'' (9)
  - 23.375'' (1)
  - 24'' (1)
  - 32.25'' (1)
  - 5'' (1)
  - 5.5'' (1)
  - 7.3'' (1)
  - 7.5'' (3)
  - 7.75'' (1)
  - 8'' (7)
  - 8.063'' (1)
  - 8.3'' (2)
  - 8.5'' (1)
  - 9'' (1)
  - 9.25'' (2)
  - 9.75'' (2)
  - View More View Less
- Cartridge
- Contour
- Muzzle
- Twist
  - 1-10 (23)
  - 1-11 (1)
  - 1-12 (1)
  - 1-16 (1)
  - 1-7 (82)
  - 1-8 (59)
  - 1-9 (1)
  - 1-9.5 (2)
  - View More View Less
- Finish
- Stock status
  - In Stock (Brownells Partner) (2)
  - In Stock (Brownells USA) (24)
- Feedback
View all filters