Summer Cleanout Sale!
Huge Savings On 2000+ Items From 200+ Brands - SHOP NOW

Summer Cleanout Sale!
Huge Savings On 2000+ Items From 200+ Brands - SHOP NOW

Daily Deal: Brownells Gun Scrubber Aerosole Cleaner $8.99 $6.99- Get Yours!

3993-Daniel-Defense-Uppers-CP-Hero-1920x385
3993-Daniel-Defense-Uppers-CP-Hero-768x450

EXCLUSIVE DANIEL DEFENSE
MK18 & M4A1 STRIPPED UPPERS

RISII & RISIII Rails, Cold Hammer Forged Barrels
& Legendary Daniel Defense Quality
Explore The Uppers
4509 Site Banners - BRN180 Gen-3 Launch_Category Hero
4509 Site Banners - BRN180 Gen-3 Launch_Category Hero Mobile(1)

BROWNELLS BRN-180® GEN3

You've Been Waiting - Don't Miss Out Again!
Back In Stock!
6294 Brownells Banners - Week 11 - Category Header_Geissele
6294 Brownells Banners - Week 11 - Category Header_Geissele Mobile

THE GOLD STANDARD
OF AR UPGRADES!

Shop Geissele Uppers,
Triggers, and Upgrades!
Upgrade Now!
6179 Brownells Site Banners - Week 6 - Category Header Banners_Howa
6179 Brownells Site Banners - Week 6 - Category Header Banners_Howa Mobile

EXCLUSIVE HOWA BARRELED ACTIONS
- PERFORMANCE GUARANTEED

Howa barreled actions ensure
the confidence needed to hit your mark
on the range, at competition or on the hunt!
Take Advantage Now
6275 Brownells Banner - New product - _Category Header
6275 Brownells Banner - New product - _Category Header Mobile

SMALLER.
LIGHTER.
STRONGER.

Check-Out The New
Law Folder Gen S!
Take A Look
4662-BRN-180-Ambi-Lower-CP-Hero-1920x385
4662-BRN-180-Ambi-Lower-CP-Hero-768x450

THE BETTER HALF
OF YOUR BRN-180®

Brownells BRN-180M
Fully Ambidextrous Lower
Back In Stock!
3177-Rimefire-Focus---BRN-22_CP-HeroCarousel_1920x385
3177-Rimefire-Focus---BRN-22-CP-HeroCarousel_768x450V2

BROWNELLS BRN-22

Precision, Reliability, and Customizable
Take A Deeper Dive

Rifle Receivers & Parts

320 Items

Rifle Receivers & Parts Up To 68% Off— 320 Products In Stock / 107 Models

Our Rifle Receivers & Parts lineup includes 320 in-stock products selected from the brands serious shooters and outdoorsmen rely on. Enjoy savings Up To 68% Off on qualifying orders, and all Brownells brand products backed by our Forever Guarantee®.

You'll find options across Upper Receivers, Rifle Barreled Actions, Bolt Catch Parts, & Ejection Port Covers & Parts from 89 premium brands like AERO PRECISION, BROWNELLS, HOWA, COLT, with detailed specs to help you compare quality, materials, and performance. Verified buyers give our Rifle Receivers & Parts 4.5 Ratings out of 3,048 Reviews from verified buyers, a strong signal you can shop with confidence.

Whether you are gearing up for the range, the field, or daily carry, we stand behind every Rifle Receivers & Parts product we ship. Visit our full Rifle Parts category for the complete selection of related gear.

Sort by:
320 Total Products
You're viewing results for:
Products:  1  –  32  of 340
Number of results: 
  • 32
  • 64
  • 96
Product badge
Product badge DANIEL DEFENSE - MK18 RIII 5.56X45MM STRIPPED UPPER RECEIVER DANIEL DEFENSE - MK18 RIII 5.56X45MM STRIPPED UPPER RECEIVER
5 Stars
(4.8)

$899.99

In stock
Product badge
Product badge DANIEL DEFENSE - M4A1 RIII 5.56X45MM STRIPPED UPPER RECEIVER DANIEL DEFENSE - M4A1 RIII 5.56X45MM STRIPPED UPPER RECEIVER
5 Stars
(4.9)

$899.99

In stock
Product badge
Product badge DANIEL DEFENSE - M4A1 FSP 5.56X45MM STRIPPED UPPER RECEIVER DANIEL DEFENSE - M4A1 FSP 5.56X45MM STRIPPED UPPER RECEIVER
5 Stars
(4.9)

$899.99

In stock
Product badge
Product badge DANIEL DEFENSE - M4A1 SOCOM BLOCK II 5.56 NATO STRIPPED UPPER RECEIVER DANIEL DEFENSE - M4A1 SOCOM BLOCK II 5.56 NATO STRIPPED UPPER RECEIVER
5 Stars
(4.6)

$899.99 - $949.99

Select Items In Stock
Product badge FIGHTLITE INDUSTRIES - MCR BELT-FED UPPER RECEIVER FULL AUTO FIGHTLITE INDUSTRIES - MCR BELT-FED UPPER RECEIVER FULL AUTO
5 Stars
(4.8)

$5,799.99

Select Items In Stock
Product badge GEISSELE AUTOMATICS LLC - MK16 URG-I COMPLETE UPPER RECEIVERS 5.56MM GEISSELE AUTOMATICS LLC - MK16 URG-I COMPLETE UPPER RECEIVERS 5.56MM
5 Stars
(4.8)

$1,525.00

Select Items In Stock
Product badge AMERICAN DEFENSE MANUFACTURING - AR-15 UIC STRIPPED LOWER AMBI RECEIVER AMERICAN DEFENSE MANUFACTURING - AR-15 UIC STRIPPED LOWER AMBI RECEIVER
5 Stars
(4.6)

$399.99

Online Only - In stock
Product badge BRAVO COMPANY - RECEIVERS W/ MK2 RMS & MOD-1 SOPMOD STOCK BRAVO COMPANY - RECEIVERS W/ MK2 RMS & MOD-1 SOPMOD STOCK
5 Stars
(5.0)

$563.00

Select Items In Stock
Product badge GEISSELE AUTOMATICS LLC - MARITIME BOLT CATCH FOR AR-15 GEISSELE AUTOMATICS LLC - MARITIME BOLT CATCH FOR AR-15
5 Stars
(4.5)

$31.00

In stock
Product badge GEISSELE AUTOMATICS LLC - AR-15 PREMIUM MIL-SPEC BUFFER TUBE ASSEMBLY WITH SUPER 42 GEISSELE AUTOMATICS LLC - AR-15 PREMIUM MIL-SPEC BUFFER TUBE ASSEMBLY WITH SUPER 42
5 Stars
(5.0)

$133.00 - $197.00

Select Items In Stock
Product badge MAGPUL - B.A.D. LEVER® BATTERY ASSIST DEVICE FOR AR-15/M4 MAGPUL - B.A.D. LEVER® BATTERY ASSIST DEVICE FOR AR-15/M4
5 Stars
(4.4)

$26.49

In stock
Product badge BROWNELLS - BRN-15 UPPER RECEIVERS 5.56MM NATO BROWNELLS - BRN-15 UPPER RECEIVERS 5.56MM NATO
5 Stars
(3.8)

$399.99 - $429.99

Select Items In Stock
Product badge RADIAN WEAPONS - A-DAC 15 AMBIDEXTROUS LOWER RECEIVER RADIAN WEAPONS - A-DAC 15 AMBIDEXTROUS LOWER RECEIVER
5 Stars
(5.0)

$514.95

Online Only - In stock
Product badge BROWNELLS - AR-15/M16 DETENT TAKEDOWN SPRINGS BROWNELLS - AR-15/M16 DETENT TAKEDOWN SPRINGS
5 Stars
(5.0)

$0.99

In stock
Product badge DANIEL DEFENSE - DDM4 300s 10.3" 300 AAC BLACKOUT UPPER RECEIVER BLACK DANIEL DEFENSE - DDM4 300s 10.3" 300 AAC BLACKOUT UPPER RECEIVER BLACK
5 Stars
(0.0)

$1,392.00

In stock
Product badge COLT - AR15A4 UPPER RCVR ASSEMBLY, CARBINE COLT - AR15A4 UPPER RCVR ASSEMBLY, CARBINE
5 Stars
(4.0)

$175.99

In stock
Product badge BRAVO COMPANY - AR-15 COMPLETE WIDEBODY LOWER W/MK2RMS-M1T0 & MOD-2-SOPMOD STOCK BRAVO COMPANY - AR-15 COMPLETE WIDEBODY LOWER W/MK2RMS-M1T0 & MOD-2-SOPMOD STOCK
5 Stars
(4.6)

$559.00

Select Items In Stock
Product badge LMT DEFENSE - DEFENDER-L STRIPPED LOWER RECEIVER LMT DEFENSE - DEFENDER-L STRIPPED LOWER RECEIVER
5 Stars
(0.0)

$188.99

Online Only - In stock
Product badge PRECISION REFLEX, INC. - AR-15 MK12 MOD 0 GEN III 5.56X45 NATO UPPER RECEIVER PRECISION REFLEX, INC. - AR-15 MK12 MOD 0 GEN III 5.56X45 NATO UPPER RECEIVER
5 Stars
(0.0)

$1,709.00 - $1,729.00

Select Items In Stock
Product badge DANIEL DEFENSE - MK18 5.56 UPPER RECEIVER GROUP COMPLETE DANIEL DEFENSE - MK18 5.56 UPPER RECEIVER GROUP COMPLETE
5 Stars
(5.0)

$1,454.00

Select Items In Stock
Product badge COLT - AR15A4 TAKEDOWN PIN SPRING COLT - AR15A4 TAKEDOWN PIN SPRING
5 Stars
(5.0)

$2.19

In stock
Product badge COLT - AR15A4 UPPER RCVR, FLATTOP, MOD. CARB COLT - AR15A4 UPPER RCVR, FLATTOP, MOD. CARB
5 Stars
(4.3)

$129.99

In stock
Product badge CMMG - AR-15 Ejection Cover Hinge Pin Snap Ring CMMG - AR-15 Ejection Cover Hinge Pin Snap Ring
5 Stars
(5.0)

$1.38

In stock
Product badge GEISSELE AUTOMATICS LLC - SUPER DUTY TAKEDOWN PIN SET GEISSELE AUTOMATICS LLC - SUPER DUTY TAKEDOWN PIN SET
5 Stars
(5.0)

$19.00

In stock
Product badge MAGPUL - ENHANCED EJECTION PORT COVERS FOR AR-15 MAGPUL - ENHANCED EJECTION PORT COVERS FOR AR-15
5 Stars
(4.1)

$11.49 - $12.99

In stock
Product badge CMMG - AR-15 BOLT CATCH ROLL PIN CMMG - AR-15 BOLT CATCH ROLL PIN
5 Stars
(4.2)

$0.88

$1.03

In stock
Product badge CMMG - AR-15 BUFFER RETAINER CMMG - AR-15 BUFFER RETAINER
5 Stars
(5.0)

$2.00 - $2.95

$2.35

In stock
Product badge Z-M WEAPONS - AR-15/M16 ACCU-WEDGE Z-M WEAPONS - AR-15/M16 ACCU-WEDGE
5 Stars
(4.0)

$13.99

In stock
Product badge FAXON FIREARMS - FX7 6.5 CREEDMOOR BARRELED BOLT ACTION RECEIVER FAXON FIREARMS - FX7 6.5 CREEDMOOR BARRELED BOLT ACTION RECEIVER
5 Stars
(0.0)

$1,038.68 - $1,057.08

Online Only - In stock
Product badge AR CATCH22 - AR-15 .22LR V1 CATCH22 BOLT CATCH AR CATCH22 - AR-15 .22LR V1 CATCH22 BOLT CATCH
5 Stars
(4.8)

$24.99

In stock
Product badge PRECISION REFLEX, INC. - AR-15 MK12 MOD 0 SPR GEN II 5.56X45 NATO UPPER RECEIVER PRECISION REFLEX, INC. - AR-15 MK12 MOD 0 SPR GEN II 5.56X45 NATO UPPER RECEIVER
5 Stars
(4.0)

$1,757.00 - $1,777.00

Select Items In Stock
Product badge WILSON COMBAT - AR-15 EJECTION PORT COVER PARTS KIT ONLY WILSON COMBAT - AR-15 EJECTION PORT COVER PARTS KIT ONLY
5 Stars
(5.0)

$3.95

In stock
Products:  1  –  32  of 340