15% OFF - Use Code: MEM26

AR15 Upper Receiver Replacement Parts

Complete Uppers

Barreled Uppers

Upper Build Kit

UPPER RECEIVERS

CHARGING HANDLES

HARDWARE, DOORS & SMALL PARTS

GAS SYSTEM PARTS

Show Filters

Show:

Previous
6
7
8
9
10
11
12
13
14
Next

RTB Complete 10.5" 5.56 Upper Receiver - Tungsten | FLASH CAN | 12" M-LOK | With BCG & CH

MSRP: $543.95

SALE PRICE: $419.95

Click for Price

Notify Me
RTB Complete 10.5" 5.56 Upper Receiver - Sniper Gray | FLASH CAN | 12" M-LOK | With BCG & CH

MSRP: $543.95

SALE PRICE: $419.95

Click for Price

Notify Me
RTB 10.5" 5.56 Upper Receiver - Sniper Gray | FLASH CAN | 12" M-LOK | Without BCG & CH

MSRP: $488.95

SALE PRICE: $310.95

Click for Price

Notify Me
*BLEM* Yankee Hill Flat Top Upper Receiver, Stripped

MSRP: $95.50

SALE PRICE: $71.99

Click for Price

Notify Me
BG Complete 10.5" 7.62 x 39 Upper Receiver - Black | A2 | 9" M-LOK | With BCG & CH

MSRP: $450.95

SALE PRICE: $275.95

Click for Price

Notify Me
Vortex Razor HD Gen III 1-10x24 FFP EBR-9 MRAD with Free BG Complete 16" 5.56 Upper Receiver - Black

MSRP: $3,599.99

SALE PRICE: $2,896.95

Click for Price

Notify Me
Pistol Build Kit - 5.56 | 7.5" Complete Upper Receiver w/ A2| MF Stabilizer | TS LPK

MSRP: $679.90

SALE PRICE: $430.95

Click for Price

Notify Me
Pistol Build Kit - 5.56 | 10.5" Complete Upper Receiver w/Flash Can| MF Stabilizer | TS LPK

MSRP: $699.90

SALE PRICE: $494.95

Click for Price

Notify Me
BG Complete 10.5" 5.56 Upper Receiver - Black | A2 | 9" M-LOK | With BCG & CH

MSRP: $441.95

SALE PRICE: $264.95

Click for Price

Notify Me
Upper Build Kit 7.5" 5.56 Pistol - FDE | FLASH CAN | 9" M-LOK | With BCG & CH

MSRP: $533.95

SALE PRICE: $319.95

Click for Price

Notify Me
Upper Build Kit 7.5" 5.56 Pistol - Black | FLASH CAN | 9.25" M-LOK | With BCG & CH

MSRP: $524.95

SALE PRICE: $313.95

Click for Price

Notify Me
Upper Build Kit 7.5" 5.56 Pistol - Black | A2 | 7.25" M-LOK | With BCG & CH

MSRP: $514.95

SALE PRICE: $267.95

Click for Price

Notify Me
Pistol Build Kit - 5.56 | 7.5" Complete Upper Receiver w/Flash Can| MF Stabilizer | TS LPK

MSRP: $689.90

SALE PRICE: $442.95

Click for Price

Notify Me
RTB Complete 16" .22LR Upper Receiver - Black | A2 | 15" M-LOK | with BCG & CH

MSRP: $589.95

SALE PRICE: $509.95

Click for Price

Notify Me
*BLEM* Standard AR15/M4 5.56 Charging Handle

MSRP: $20.00

SALE PRICE: $10.00

Click for Price

Notify Me
BN - Assembled Billet Upper + Handguard Set | Port Door | Slick Side

MSRP: $130.00

SALE PRICE: $94.95

Click for Price

Notify Me
RTB Complete 16" .22LR Upper Receiver - FDE | A2 | 15" M-LOK | with BCG & CH

MSRP: $607.95

SALE PRICE: $543.95

Click for Price

Notify Me
RTB Complete 16" .22LR Upper Receiver - FDE | A2 | 12" M-LOK | with BCG & CH

MSRP: $604.95

SALE PRICE: $537.95

Click for Price

Notify Me
RTB Complete 16" .22LR Upper Receiver - FDE | A2 | 13.5" M-LOK | with BCG & CH

MSRP: $606.95

SALE PRICE: $541.95

Click for Price

Notify Me
RTB Complete 16" .22LR Upper Receiver - Black | A2 | 13.5" M-LOK | with BCG & CH

MSRP: $589.95

SALE PRICE: $508.95

Click for Price

Notify Me
BN - Assembled Billet Upper Receiver | Port Door | Slick Side

MSRP: $69.95

SALE PRICE: $54.95

Click for Price

Notify Me
CMMG Inc. ZEROED AR15 Polymer Dust Cover Kit

MSRP: $9.95

SALE PRICE: $8.95

Click for Price

Notify Me
RTB Complete 16" .22LR Upper Receiver - Black | A2 | 12" M-LOK | with BCG & CH

MSRP: $587.95

SALE PRICE: $504.95

Click for Price

Notify Me
Timber Creek AR-10 Billet Dust Cover - OD Green

MSRP: $35.99

SALE PRICE: $28.79

Click for Price

Notify Me
Ballistic Advantage 10.3" Hanson 5.56 Upper Receiver | 9" M-LOK ATLAS R-ONE | Without BCG & CH

MSRP: $484.00

SALE PRICE: $339.95

Click for Price

Notify Me
Aero Precision EPC-9 - Enhanced Upper Receiver w/ Last Round Bolt Hold Open - Anodized Black

MSRP:

MSRP: $199.99

Click for Price

Notify Me
*BLEM* Seekins Precision Select Adjustable Gas Block - .750

MSRP: $119.00

SALE PRICE: $85.95

Click for Price

Notify Me
DB 4.5" 9mm Barrel + 9mm Slick Side Upper Receiver Combo

MSRP: $220.00

SALE PRICE: $101.95

Click for Price

Notify Me
BLEM Spikes Tactical Micro Gas Block (.625) Low Profile

MSRP: $29.95

SALE PRICE: $15.95

Click for Price

Notify Me
Aero Precision AR15 BREACH Ambi Charging Handle w/ Large Lever - Tan

MSRP:

MSRP: $79.99

Click for Price

Notify Me
BLEM Lightweight Adjustable Gas Block - Select Size

MSRP: $59.99

SALE PRICE: $19.95

Click for Price

Notify Me
Blem - Clearance - AR10 DPMS Upper Receiver

MSRP: $109.99

SALE PRICE: $50.00

Click for Price

Notify Me
BYO 7.5" 5.56 Pistol Upper Receiver - Assembly Available

MSRP: $489.95

SALE PRICE: $297.70

Click for Price

Notify Me
16" 9mm Upper Receiver - FDE | A2 | 12" M-LOK Slant Cut HG | Pistol Caliber | Without BCG & CH

MSRP: $415.95

SALE PRICE: $222.95

Click for Price

Notify Me
16" 9mm Upper Receiver - BLK + FDE | A2 | 12" M-LOK Slant Cut HG | Pistol Caliber | Without BCG & CH

MSRP: $408.95

SALE PRICE: $210.95

Click for Price

Notify Me
16" 9mm Upper Receiver - FDE | A2 | 15" M-LOK HG | Pistol Caliber | Without BCG & CH

MSRP: $408.95

SALE PRICE: $210.95

Click for Price

Notify Me
16" 9mm Upper Receiver - BLK + FDE | A2 | 15" M-LOK HG | Pistol Caliber | Without BCG & CH

MSRP: $401.95

SALE PRICE: $199.95

Click for Price

Notify Me
RTB Complete 10.5" 5.56 Upper Receiver - Black | FLASH CAN | 12" M-LOK | With BCG & CH

MSRP: $525.95

SALE PRICE: $381.95

Click for Price

Notify Me
AR-9 4.5" Complete Upper Receiver Build Kit - 4.25" M-LOK Handguard

MSRP: $430.95

SALE PRICE: $219.95

Click for Price

Notify Me
Aero Precision EPC-9 Threaded Upper Receiver w/ LRBHO - Anodized Black

MSRP:

MSRP: $134.99

Click for Price

Notify Me
Spike's Tactical Stripped Lower / Upper Set - Spider Logo - Grey

MSRP: $260.00

SALE PRICE: $234.00

Click for Price

Notify Me
Complete 16" 5.56 Carbine Upper Receiver - FDE | 15" M-LOK | With BCG & CH

MSRP: $472.95

SALE PRICE: $315.95

Click for Price

Notify Me
CMMG Upper Receiver Assembly Mk4 / AR15 Upper Receiver - Armor Black

MSRP:

MSRP: $149.95

Click for Price

Notify Me
BLEM - Anderson Anodized M4 Upper Receiver - Stripped

MSRP: $59.95

SALE PRICE: $49.95

Click for Price

Notify Me
EZ Pistol Kit - Blem Barreled 10.5" 5.56 Pistol | SB Tactical Brace | Pistol Buffer Tube Kit | Pick A Pistol Brace

MSRP: $356.95

SALE PRICE: $322.95

Click for Price

Notify Me
10.5" 5.56 Pistol Upper Receiver - Black | FLASH CAN | 12" M-LOK Slant Cut | Without BCG & CH

MSRP: $402.95

SALE PRICE: $199.95

Click for Price

Notify Me
BCG Upper Build Kit - Lightweight Black Nitride Bolt Carrier Group with Blemished Anodized Upper Receiver and Mil Spec Charging Handle

MSRP: $259.00

SALE PRICE: $167.95

Click for Price

Notify Me
Pistol Build Kit - 5.56 | 7.5" Complete Upper Receiver w/Flash Can| Shockwave Blade | XTS LPK

MSRP: $689.90

SALE PRICE: $472.95

Click for Price

Notify Me
Pistol Build Kit - 5.56 | 7.5" Complete Upper Receiver | Shockwave Blade | XTS LPK

MSRP: $689.90

SALE PRICE: $460.95

Click for Price

Notify Me
BCG Upper Build Kit - M16 Black Nitride Bolt Carrier Group with Blemished Anodized Upper Receiver and Mil Spec Charging Handle

MSRP: $244.00

SALE PRICE: $128.95

Click for Price

Notify Me
M4 Flat Top BLEM Upper Receiver - with 5.56 Black Nitride Bolt Carrier Group

MSRP: $230.00

SALE PRICE: $124.95

Click for Price

Notify Me
M4 Flat Top Upper Receiver - Stripped BLEM

MSRP: $79.95

SALE PRICE: $33.95

Click for Price

Notify Me
10.5" 5.56 Pistol Upper Receiver - FDE | A2 | 9" M-LOK | Without BCG & CH

MSRP: $404.95

SALE PRICE: $204.95

Click for Price

Notify Me
Slick Side M4 Upper Receiver with Port Door - T marks

MSRP: $129.95

SALE PRICE: $79.95

Click for Price

Notify Me
Complete 7.5" 5.56 Pistol Upper Receiver - FDE | FLASH CAN | 9" M-LOK | With BCG & CH

MSRP: $466.95

SALE PRICE: $306.95

Click for Price

Notify Me
AO BCG Upper Build Kit - RTB M16 Black Nitride Bolt Carrier Group with Anodized Upper Receiver and Mil Spec Charging Handle

MSRP: $363.99

SALE PRICE: $144.95

Click for Price

Notify Me
RTB BCG Upper Build Kit - RTB M16 Black Nitride Bolt Carrier Group with Anodized Upper Receiver and Mil Spec Charging Handle

MSRP: $313.98

SALE PRICE: $127.95

Click for Price

Notify Me
CMMG Extended ZEROED Ambi Charging Handle - AR15

MSRP:

MSRP: $79.95

Click for Price

Notify Me
Bushmaster Complete M4 Patrolman's Upper - 16" Upper 5.56 NATO - Flat Top I6 | With BCG & CH

MSRP: $564.99

SALE PRICE: $540.95

Click for Price

Notify Me
Bushmaster Complete Quick Response Carbine Upper - 16" Upper 5.56 NATO - QRC | With BCG & CH

MSRP:

MSRP: $530.00

Click for Price

Notify Me

Previous
6
7
8
9
10
11
12
13
14
Next

We carry everything you need to upgrade your AR15 upper receiver with the best replacement parts from top brands including Spike’s Tactical, Rock River Arms, BCM and more. Our selection of mil-spec upper receiver parts and hardware includes assembly and installation kits, as well as custom ejection port dust covers. We have the most versatile ambidextrous charging handles, gas system parts including gas blocks and tubes, complete upper receivers and everything else you may need to upgrade or repair your AR15 upper receiver assembly. All of our replacement AR15 upper receiver parts are made from the most durable materials and are guaranteed to fit with no additional machining.

All of our AR15 upper receiver parts and AR15 hardware are made from steel, aluminum and other durable materials. Buy now to enjoy our everyday low prices and fast shipping on all orders or contact us for more information and our experts will help you find everything you need. We also offer a Cerakoting service for several of our popular upper receivers.