Ammo Flash Sale! Take 10% Off w/ Code: FLASH - SHOP NOW

Ammo Flash Sale! Take 10% Off w/ Code: FLASH - SHOP NOW

4561 Site Banners - Winter Clearance_Category HeroV2
4561 Site Banners - Winter Clearance_Category Hero Mobile No Badge_V2

MASSIVE YEAR END SAVINGS

Save Up To 65% On Guns, Parts & More!
Shop The Winter Clearance Sale!
3993-Daniel-Defense-Uppers-CP-Hero-1920x385
3993-Daniel-Defense-Uppers-CP-Hero-768x450

DANIEL DEFENSE MK18
& M4A1 STRIPPED UPPERS

Available ONLY From Brownells
Start Your Clone!
3989-Exclusive-KSPEC-Complete-Uppers-CP-Hero-1920x385
3989-Exclusive-KSPEC-Complete-Uppers-CP-Hero-746x450

NEW UPPERS FROM
KAK INDUSTRIES

Feature Packed Exclusive Uppers Including
Down Vent BCG, Chrome Lining & MORE

Discover Now

Upper Receivers 249 Items

Upper Receivers Up To 44% Off - 249 Products In Stock / 32 Models

Browse 249 Upper Receivers from our Rifle Receivers & Parts dept including AERO PRECISION, BROWNELLS, BROWNELLS BUNDLES, & PRIMARY WEAPONS Up To 44% Off at Brownells.

Sort by:
249 Results
You're viewing results for:
Products: – of 249
Number of results:
  • 32
  • 64
  • 96
MEAN ARMS - BEARING DELAY 9MM LUGER COMPLETE UPPER RECEIVER MEAN ARMS - BEARING DELAY 9MM LUGER COMPLETE UPPER RECEIVER
5 Stars
(5.0)

$1,399.99 - $1,499.99

Select Items In Stock
DANIEL DEFENSE - DDM4V7 16" 5.56MM NATO UPPER RECEIVER BLACK DANIEL DEFENSE - DDM4V7 16" 5.56MM NATO UPPER RECEIVER BLACK
5 Stars
(5.0)

$1,214.00

In stock
GEISSELE AUTOMATICS LLC - AR-15 SUPER DUTY STRIPPED UPPER RECEIVERS 5.56MM GEISSELE AUTOMATICS LLC - AR-15 SUPER DUTY STRIPPED UPPER RECEIVERS 5.56MM
5 Stars
(5.0)
Add to cart to see price

Select Items In Stock
SONS OF LIBERTY GUN WORKS - SAGE DYNAMICS 5.56X45 COMPLETE UPPER RECEIVER ASSEMBLY FOR AR15 SONS OF LIBERTY GUN WORKS - SAGE DYNAMICS 5.56X45 COMPLETE UPPER RECEIVER ASSEMBLY FOR AR15
5 Stars
(5.0)
Add to cart to see price

In stock
BROWNELLS BUNDLES - BRN-180S 300BLK UPPER WITH VORTEX SPARC SOLAR RED DOT BROWNELLS BUNDLES - BRN-180S 300BLK UPPER WITH VORTEX SPARC SOLAR RED DOT
5 Stars
(5.0)

$1,099.99

In stock
BROWNELLS BUNDLES - BRN-180 GEN 2 COMPLETE UPPER RECEIVER WITH MI SIDE FOLDING STOCK BROWNELLS BUNDLES - BRN-180 GEN 2 COMPLETE UPPER RECEIVER WITH MI SIDE FOLDING STOCK
5 Stars
(5.0)

$974.99 - $1,099.00

Select Items In Stock
PRIMARY WEAPONS - AR-15 MK1 MOD 1-M UPPER RECEIVER ASSEMBLY 223 WYLDE M-LOK PRIMARY WEAPONS - AR-15 MK1 MOD 1-M UPPER RECEIVER ASSEMBLY 223 WYLDE M-LOK
5 Stars
(5.0)
Add to cart to see price

Select Items In Stock
AERO PRECISION - M5E1 6.5 CREEDMORE ASSEMBLED UPPER RECEIVER W/GEN 2 HANDGUARD AERO PRECISION - M5E1 6.5 CREEDMORE ASSEMBLED UPPER RECEIVER W/GEN 2 HANDGUARD
5 Stars
(5.0)
Add to cart to see price

Select Items In Stock
BROWNELLS - BRN16A1® 20" COMPLETE UPPER RECEIVERS BROWNELLS - BRN16A1® 20" COMPLETE UPPER RECEIVERS
5 Stars
(5.0)

$824.99

Select Items In Stock
SHARPS BROS - AR-15/M4 5.56MM COMPLETE UPPER SHARPS BROS - AR-15/M4 5.56MM COMPLETE UPPER
5 Stars
(5.0)

$799.99

In stock
AERO PRECISION - M5E1 308 WINCHESTER ASSEMBLED UPPER RECEIVER W/GEN 2 HANDGUARD AERO PRECISION - M5E1 308 WINCHESTER ASSEMBLED UPPER RECEIVER W/GEN 2 HANDGUARD
5 Stars
(5.0)
Add to cart to see price

In stock
COLT - M4 UPPER RECEIVER ASSEMBLY NO HANDGUARDS COLT - M4 UPPER RECEIVER ASSEMBLY NO HANDGUARDS
5 Stars
(5.0)

$749.99

In stock
Product badge FOXTROT MIKE PRODUCTS - AR-15 MIKE-15 GEN 2 UPPER RECEIVER ASSEMBLY 223 WYLDE FOXTROT MIKE PRODUCTS - AR-15 MIKE-15 GEN 2 UPPER RECEIVER ASSEMBLY 223 WYLDE
5 Stars
(5.0)

$549.99 - $749.99

$599.99

Select Items In Stock
AERO PRECISION - M4E1 6.5 GRENDEL ASSEMBLED UPPER RECEIVER W/ATLAS R-ONE AERO PRECISION - M4E1 6.5 GRENDEL ASSEMBLED UPPER RECEIVER W/ATLAS R-ONE
5 Stars
(5.0)

$579.99 - $689.99

In stock
AERO PRECISION - M4E1 5.56 ASSEMBLED UPPER RECEIVER RIFLE LENGTH W/G2 HANDGUARD AERO PRECISION - M4E1 5.56 ASSEMBLED UPPER RECEIVER RIFLE LENGTH W/G2 HANDGUARD
5 Stars
(5.0)

$599.99

In stock
AERO PRECISION - M4E1 5.56MM ASSEMBLED UPPER RECEIVER W/ATLAS R-ONE HANDGUARD AERO PRECISION - M4E1 5.56MM ASSEMBLED UPPER RECEIVER W/ATLAS R-ONE HANDGUARD
5 Stars
(5.0)

$454.99 - $599.99

In stock
AERO PRECISION - M4E1 300BLK ASSEMBLED UPPER RECEIVER W/ATLAS R-ONE HANDGUARD AERO PRECISION - M4E1 300BLK ASSEMBLED UPPER RECEIVER W/ATLAS R-ONE HANDGUARD
5 Stars
(5.0)
Add to cart to see price

Select Items In Stock
MIDWEST INDUSTRIES, INC. - AR-15 10.5" CARBINE UPPER RECEIVER 1-7 M-LOK BLK 5.56MM MIDWEST INDUSTRIES, INC. - AR-15 10.5" CARBINE UPPER RECEIVER 1-7 M-LOK BLK 5.56MM
5 Stars
(5.0)

$579.95

In stock
AERO PRECISION - M4E1 .300BLK ASSEMBLED UPPER RECEIVER W/ATLAS S-ONE HANDGUARD AERO PRECISION - M4E1 .300BLK ASSEMBLED UPPER RECEIVER W/ATLAS S-ONE HANDGUARD
5 Stars
(5.0)
Add to cart to see price

In stock
AERO PRECISION - M4E1 5.56MM ASSEMBLED UPPER RECEIVER W/GEN-2 HANDGUARD & FSB AERO PRECISION - M4E1 5.56MM ASSEMBLED UPPER RECEIVER W/GEN-2 HANDGUARD & FSB
5 Stars
(5.0)

$554.99

In stock
Product badge MIDWEST INDUSTRIES, INC. - AR-15 LIGHTWEIGHT UPPER RECEIVER W/ COMBAT RAIL HANDGUARDS MIDWEST INDUSTRIES, INC. - AR-15 LIGHTWEIGHT UPPER RECEIVER W/ COMBAT RAIL HANDGUARDS
5 Stars
(5.0)

$479.99 - $549.99

$609.95 - $614.95

In stock
AERO PRECISION - M4E1 223 WYLDE ASSEMBLED UPPER RECEIVER W/GEN-2 HANDGUARD AR15 AERO PRECISION - M4E1 223 WYLDE ASSEMBLED UPPER RECEIVER W/GEN-2 HANDGUARD AR15
5 Stars
(5.0)

$524.99 - $544.99

In stock
AERO PRECISION - M4E1 .300 AAC ASSEMBLED UPPER RECEIVER W/GEN-2 HANDGUARD AR-15 AERO PRECISION - M4E1 .300 AAC ASSEMBLED UPPER RECEIVER W/GEN-2 HANDGUARD AR-15
5 Stars
(5.0)
Add to cart to see price

In stock
AERO PRECISION - EPC-9 9MM ASSEMBLED UPPER RECEIVER W/ATLAS R-ONE HANDGUARD AERO PRECISION - EPC-9 9MM ASSEMBLED UPPER RECEIVER W/ATLAS R-ONE HANDGUARD
5 Stars
(5.0)

$444.99 - $529.99

Select Items In Stock
AERO PRECISION - M4E1 5.56 ASSEMBLED UPPER RECEIVER W/M-LOK ATLAS S-ONE HANDGUARD AERO PRECISION - M4E1 5.56 ASSEMBLED UPPER RECEIVER W/M-LOK ATLAS S-ONE HANDGUARD
5 Stars
(5.0)
Add to cart to see price

In stock
AERO PRECISION - EPC-9 9MM ENHANCED ASSEMBLED UPPER RECEIVER w/G2 HANDGUARD AERO PRECISION - EPC-9 9MM ENHANCED ASSEMBLED UPPER RECEIVER w/G2 HANDGUARD
5 Stars
(5.0)

$454.99 - $524.99

In stock
AERO PRECISION - 5.56X45 NATO ASSEMBLED UPPER RECEIVER W/BARREL FOR AR-15 AERO PRECISION - 5.56X45 NATO ASSEMBLED UPPER RECEIVER W/BARREL FOR AR-15
5 Stars
(5.0)
Add to cart to see price

In stock
Product badge GEMTECH - GVAC 5.56 UPPER RECEIVER WITH BOLT CARRIER GROUP GEMTECH - GVAC 5.56 UPPER RECEIVER WITH BOLT CARRIER GROUP
5 Stars
(5.0)

$499.99

$839.00

In stock
Product badge BROWNELLS - BRN-180 350 LEGEND 16IN COMPLETE UPPER RECEIVER ASSEMBLY BROWNELLS - BRN-180 350 LEGEND 16IN COMPLETE UPPER RECEIVER ASSEMBLY
5 Stars
(5.0)

$499.99

$899.99

In stock
STERN DEFENSE, LLC - AR-15 SD MOD 5 9MM UPPER RECEIVERS M-LOK COMPLETE STERN DEFENSE, LLC - AR-15 SD MOD 5 9MM UPPER RECEIVERS M-LOK COMPLETE
5 Stars
(5.0)

$470.45 - $486.45

In stock
Product badge FAXON FIREARMS - BANTAM 9MM LUGER COMPLETE UPPER RECEIVERS FOR AR-15 FAXON FIREARMS - BANTAM 9MM LUGER COMPLETE UPPER RECEIVERS FOR AR-15
5 Stars
(5.0)

$430.99 - $442.99

$492.20 - $506.60

In stock
STERN DEFENSE, LLC - AR-15 SD MOD 4 9MM UPPER RECEIVER 4IN M-LOK COMPLETE STERN DEFENSE, LLC - AR-15 SD MOD 4 9MM UPPER RECEIVER 4IN M-LOK COMPLETE
5 Stars
(5.0)

$419.27

In stock
Products: – of 249