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M4 Upper Receivers

This page has our most popular products related to M4 Upper Receivers. If you don't see what you are looking for here, you might try to refine your search in the search box above or browse through the categories on the left.

Need something for your AR-15 or AK-47? We have it! At Cheaper Than Dirt! We have the largest collection of accessories for your firearm. We have lights, lasers, scopes, grips, magazines, sights, and much more. You'll find everything you need. And, because we ship from several warehouses, we have the largest inventory at the lowest prices anywhere on the internet.

AR-15 Upper Receiver Stripped Mil Spec M4 Feed Ramps hard anodized coated finish
ARR-1660
$129.97
IN STOCK at Warehouse
1
AR-15 Carry Handle Black Weaver Fits on AR-15 and M4 Upper Receiver Rail
47383
$69.35
IN STOCK at Warehouses
3,4,6,8
AR-15 Upper Receiver .223 Texas Black Rifle Company
ARR-1662
$129.97
IN STOCK at Warehouse
1
A3 or A4 Stripped Upper Receiver T-Marked Without M4 Feed Ramps, No Dust Cover
ARR-1661
$119.97
IN STOCK at Warehouse
1
Anderson Stripped AR-15 A3 Upper M4 Feed Ramps Matte Black Finish A3UPPER
7-A3UPPER
$55.76
IN STOCK at Warehouse
7
Windham Weaponry AR-15 SRC Upper 16  M4 Barrel Rail Gas Block Complete with Bolt and Carrier UR16M4FTB
2-WWUR16M4FTB
$488.78
IN STOCK at Warehouse
2
AR-15 Matched Upper Build Kit with A3  T  Marked Upper, Bolt Carrier Group and Charging Handle , Black
ARR-654
$299.97
IN STOCK at Warehouse
1
Spike's Tactical AR-15 Complete Upper Flat Top Black 7075 T6 Aluminum SFT50M4
2-SPKSFT50M4
$102.65
IN STOCK at Warehouse
2
Windham Weaponry 16” M4 Profile AR-15 Upper Receiver, Complete, Flat Top
2-WWUR16M4LHB
$488.78
IN STOCK at Warehouse
2
Weaver AR-15 Carry Handle Black
6-0922271
$87.70
IN STOCK at Warehouses
3,4,6,8
Weaver AR-15 Carry Handle Black
3-0922271
$87.70
IN STOCK at Warehouses
3,4,6,8
Weaver AR-15 Carry Handle Black
8-WEAVER-48326
$81.73
IN STOCK at Warehouses
3,4,6,8
RGuns AR-15 Complete Upper Assembly .223 Rem/5.56 NATO 16  M4 Barrel 1:9 Twist Flat Top Receiver A2 Front Sight Black
7-M4CU
$459.94
IN STOCK at Warehouse
7
American Tactical Imports M4-22 AR-15 Complete Upper Assembly .22 LR 28 Round Magazine Flat Top M4 Profile Barrel Black 8ATIM42228
3-0409319
$308.52
IN STOCK at Warehouse
3
JSE AR-15 5.56 Complete 16  M4 Upper With Adams Arms Gas Piston 1:9  Twist Civilian M4 Barrel
ARR-631
$719.97
IN STOCK at Warehouse
1
BSA Tactical Weapon AR/M4 Upper Receiver Handle Mount with Rings TWAR15
9-106104
$23.93
IN STOCK at Warehouse
9
Bushmaster M4A3 Patrolman's Carbine Complete Upper Receiver .223 Rem/5.56 NATO 16  M4 Barrel 1:9 Twist Flat Top Black 91822
8-BF-91822
$609.88
IN STOCK at Warehouses
10,11,2,3,6,8
Bushmaster M4A3 Patrolman's Carbine Complete Upper Receiver .223 Rem/5.56 NATO 16  M4 Barrel 1:9 Twist Flat Top Black 91822
2-BM91822
$584.68
IN STOCK at Warehouses
10,11,2,3,6,8
Bushmaster M4A3 Patrolman's Carbine Complete Upper Receiver .223 Rem/5.56 NATO 16  M4 Barrel 1:9 Twist Flat Top Black 91822
10-0409384
$535.89
IN STOCK at Warehouses
10,11,2,3,6,8
Bushmaster M4A3 Patrolman's Carbine Complete Upper Receiver .223 Rem/5.56 NATO 16  M4 Barrel 1:9 Twist Flat Top Black 91822
11-0409384
$535.89
IN STOCK at Warehouses
10,11,2,3,6,8
Bushmaster M4A3 Patrolman's Carbine Upper .223 Rem/5.56 NATO 16  M4 Barrel 1:9 Twist Flat Top Receiver Aluminum Black
6-0409384
$535.89
IN STOCK at Warehouses
10,11,2,3,6,8
Bushmaster M4A3 Patrolman's Carbine Complete Upper Receiver .223 Rem/5.56 NATO 16  M4 Barrel 1:9 Twist Flat Top Black 91822
3-0409384
$535.89
IN STOCK at Warehouses
10,11,2,3,6,8
Windham Weaponry AR-15 SRC 5.56mm NATO/.223 Rem16  M4 Barrel Front Sight Flat Top Receiver Complete Upper UR16M4LHPBB
9-102164
$513.91
IN STOCK at Warehouse
9
Troy Industries M7 5.56 Upper Receiver 7.5  Barrel Tritium M4 Folding Front Sight Folding Rear Sight Flat Dark Earth SM7A-CUK-00FT-00
9-71879
$1,227.44
IN STOCK at Warehouse
9
Midwest Industries AR-15 Billet Stripped Upper Receiver Aluminum Anodized MIARBU
7-MIARBU
$164.95
IN STOCK at Warehouse
7
DPMS AR-15 Flat Top Upper
ARR-1663
$129.97
IN STOCK at Warehouse
1
Core Rifle Systems C15 AR-15 Complete Upper Assembly .223 Rem/5.56 NATO 16  M4 Barrel Carbine Length Gas Magpul MOE Handguard A2 Front Sight Black 100273B
2-CORE100273B
$564.50
IN STOCK at Warehouse
2
Olympic Arms K3BM4A3 M4 AR-15 Carbine 5.56 NATO 30 Rounds 16  M4 Barrel A3 Upper with Removable Carry Handle and Rear Sight Black M4 Buttstock
38640
$901.99
IN STOCK at Warehouse
4
Mako Group AR-15 M16 M4 Noise and Movement Eliminator Set of 25
56350
$26.40
IN STOCK at Warehouse
4
Bushmaster M4 Semi-Automatic Lower .223 Rem/5.56 NATO 14.5  Black Telestock M4 Collapsible Stock 92950
2-BM92950
$317.62
IN STOCK at Warehouses
2,8
AR-15 Complete M4 Upper 5.56 NATO Nitride Treated 1x7  Twist Barrel  F  Marked Front Sight Tower Complete Bolt Charging Handle
ARR-649
$499.97
IN STOCK at Warehouse
1
Core15 M4 Complete Upper 16  Barrel 5.56 NATO with BCG Black 100276
2-CORE100276
$461.21
IN STOCK at Warehouses
2,3
Core15 M4 Complete Upper 16  Barrel 5.56 NATO with BCG Black 100276
3-0406508
$473.86
IN STOCK at Warehouses
2,3
Chiappa M4-22 Conversion Complete Upper Assembly .22 Long Rifle 16  M4 Barrel 28 Rounds Flat Top Black M4-22LR UPPER
7-M422UPPER
$295.83
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
BSA Tactical Weapon AR/M4 Upper Receiver Handle Mount with Rings and Upper Mount Matte Black TWAR223RM
9-106108
$34.64
IN STOCK at Warehouse
9
AR-15 A3 Flat Top M4 Complete Upper Receiver Del-Ton Machined 7075-T6 Aluminum Forged  T  Marked Rail
ARR-971
$99.97
IN STOCK at Warehouse
1
CMMG AR-15 M4 Flat Top Upper Receiver .223 Rem/5.56 NATO 1:9  Twist Micro Gas Block WASP Finish
2-CMMG55B90AD
$510.52
IN STOCK at Warehouse
2
DSA ZM4 Semi Auto Rifle 5.56 NATO 16  M4 Barrel 30 Rounds 6 Position Stock Black Nitride Finish ZM4RCR16M4-A
2-DSAZM4RCR16M4-A
$766.02
IN STOCK at Warehouse
2
Chiappa M4-22 Conversion Complete Upper Assembly .22 Long Rifle 16  M4 Barrel 28 Rounds Flat Top Black M4-22LR UPPER
2-CHPM4-22LRUPPER
$283.82
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
Olympic Arms K3B-M4 Semi Auto Rifle .223 Rem/5.56 NATO 16  Barrel 30 Rounds Fixed Carry Handle Collapsible Stock Black Finish K3BM4
38638
$825.09
IN STOCK at Warehouse
4
Chiappa M4-22 Conversion Complete Upper Assembly .22 Long Rifle 16  M4 Barrel 28 Rounds Flat Top Black M4-22LR UPPER
10-0409291
$302.80
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
Chiappa M4-22 Conversion Complete Upper Assembly .22 Long Rifle 16  M4 Barrel 28 Rounds Flat Top Black M4-22LR UPPER
11-0409291
$302.80
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
Chiappa M4-22 Conversion Complete Upper Assembly .22 Long Rifle 16  M4 Barrel 28 Rounds Flat Top Black M4-22LR UPPER
12-0409291
$302.80
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
Chiappa M4-22 Conversion Complete Upper Assembly .22 Long Rifle 16  M4 Barrel 28 Rounds Flat Top Black M4-22LR UPPER
3-0409291
$302.80
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
Chiappa M4-22 Conversion Complete Upper Assembly .22 Long Rifle 16  M4 Barrel 28 Rounds Flat Top Black M4-22LR UPPER
6-0409291
$302.80
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
Chiappa M4-22 Conversion Complete Upper Assembly .22 Long Rifle 16  M4 Barrel 28 Rounds Flat Top Black M4-22LR UPPER
8-MKS-M42228UR
$298.82
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
Windham Weaponry AR-15 Complete Upper Assembly .223 Rem/5.56 NATO 16  M4 Barrel Carbine Length Gas System Fixed Front Sight Removable Carry Handle UR16M4A4B
8-WW-UR16M4A4B
$573.16
IN STOCK at Warehouses
4,8
Houlding Precision Firearms AR-15 Upper Receiver CNC Machined 7075 T6 Billet Aluminum Black HPF-15G2U
2-HPF-15G2UPPER
$236.66
IN STOCK at Warehouse
2
M4 Rifle Kit Complete Less Lower, 16  M-4 Barrel 1x7  Twist Standard Carbine Handguards and 6 Position Stock
ARR-646
$499.97
IN STOCK at Warehouse
1
M4 Rifle Kit Complete Less Lower, 16  M-4 Barrel 1x9  Twist CAR Handguards and 6 Pos Stock
ARR-647
$499.97
IN STOCK at Warehouse
1
Windham Weaponry AR-15 SRC Semi Auto Rifle .223 Rem/5.56 NATO 16  Chrome Lined M4 Barrel 30 Rounds Flat Top Upper M4 Stock Black Finish  R16M4FTT
8-WW-R16M4FTT
$773.31
IN STOCK at Warehouses
10,12,2,3,1,4,7,8
Windham Weaponry AR-15 SRC Semi Auto Rifle .223 Rem/5.56 NATO 16  Chrome Lined M4 Barrel 30 Rounds Flat Top Upper M4 Stock Black Finish  R16M4FTT
2-WWR16M4FTT
$784.24
IN STOCK at Warehouses
10,12,2,3,1,4,7,8
Colt 6920 AR-15 Semi Auto Rifle 5.56 NATO 16  M4 Barrel 30 Rounds M4 Stock Black LE6920
2-CTLE6920
$1,076.90
IN STOCK at Warehouses
2,4,7,8
Colt 6920 AR-15 Semi Auto Rifle 5.56 NATO 16  M4 Barrel 30 Rounds M4 Stock Black LE6920
7-GLE6920
$1,076.90
IN STOCK at Warehouses
2,4,7,8
Colt 6920 AR-15 Semi Auto Rifle 5.56 NATO 16  M4 Barrel 30 Rounds M4 Stock Black LE6920
8-CLT-LE6920
$1,076.90
IN STOCK at Warehouses
2,4,7,8
Colt 6920 AR-15 Semi Auto Rifle 5.56 NATO 16  M4 Barrel 30 Rounds M4 Stock Black LE6920
07000
$990.00
IN STOCK at Warehouses
2,4,7,8
AR-15 5.56 Complete Upper Slick Side Flat Top Lo-Pro 1 in 9  M4 Barrel Railed Gas Block Standard Handguards
ARR-641
$449.97
IN STOCK at Warehouse
1
Chiappa M4-22 Conversion Complete Upper Assembly .22 Long Rifle 16  M4 Barrel 28 Rounds Flat Top Black M4-22LR Upper 500057
80361
$283.38
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
CMMG AR-15 Complete Upper Assembly 9mm Luger 16  M4 Barrel 1:10 Twist Flat Top Receiver A2 Front Sight Black WASP Finish
2-CMMG90B1AA2
$615.65
IN STOCK at Warehouse
2
Windham Weaponry AR-15 Complete Upper Assembly .223 Rem/5.56 NATO 16  M4 Barrel Carbine Length Gas System Fixed Front Sight Removable Carry Handle UR16M4A4B
84212
$575.00
IN STOCK at Warehouses
4,8
DPMS AR-15 M4 5,56 NATO Complete Upper Assembly, Flattop Receiver, 16  Barrel, 1-9  Twist, Detachable Carry Handle BAAP416CH
10-0408831
$535.08
IN STOCK at Warehouses
10,11,2,3
DPMS AR-15 M4 Complete Upper Assembly, Flattop Receiver, 16  Barrel, 1-9  Twist, Detachable Carry Handle BAAP416CH
11-0408831
$535.08
IN STOCK at Warehouses
10,11,2,3
DPMS AR-15 M4 Complete Upper Assembly, Flattop Receiver, 16  Barrel, 1-9  Twist, Detachable Carry Handle BAAP416CH
2-DPBAAP416CH
$518.91
IN STOCK at Warehouses
10,11,2,3
DPMS AR-15 5.56 NATO M4 Complete Upper Assembly Flattop Receiver 16  Barrel
3-0408831
$535.08
IN STOCK at Warehouses
10,11,2,3
Windham Weaponry AR-15 SRC Semi Auto Rifle .223 Rem/5.56 NATO 16  Chrome Lined M4 Barrel 30 Rounds Flat Top Upper M4 Stock Black Finish  R16M4FTT
7-G0026
$760.29
IN STOCK at Warehouses
10,12,2,3,1,4,7,8
Windham Weaponry AR-15 SRC Semi Auto Rifle .223 Rem/5.56 NATO 16  Chrome Lined M4 Barrel 30 Rounds Flat Top Upper M4 Stock Black Finish  R16M4FTT
77545
$759.47
IN STOCK at Warehouses
10,12,2,3,1,4,7,8
Windham Weaponry AR-15 SRC Semi Auto Rifle .223 Rem/5.56 NATO 16  Chrome Lined M4 Barrel 30 Rounds Flat Top Upper M4 Stock Black Finish  R16M4FTT
10-0135584
$792.86
IN STOCK at Warehouses
10,12,2,3,1,4,7,8
Windham Weaponry AR-15 SRC Semi Auto Rifle .223 Rem/5.56 NATO 16  Chrome Lined M4 Barrel 30 Rounds Flat Top Upper M4 Stock Black Finish  R16M4FTT
12-0135584
$792.86
IN STOCK at Warehouses
10,12,2,3,1,4,7,8
Windham Weaponry AR-15 SRC Semi Auto Rifle .223 Rem/5.56 NATO 16  Chrome Lined M4 Barrel 30 Rounds Flat Top Upper M4 Stock Black Finish  R16M4FTT
3-0135584
$792.86
IN STOCK at Warehouses
10,12,2,3,1,4,7,8
Midwest Industries AR-15 Complete Forged Upper Receiver Aluminum Black MI-FCU
2-MWMI-FCU
$107.20
IN STOCK at Warehouse
2
Daniel Defense DDM4 V1 AR-15 Complete Upper Assembly .223 Rem/5.56 NATO 16  Barrel Carbine Length Gas System 12  DDM4 Quad Rail Black 23-050-08176
2-DD23-050-08176
$1,199.00
IN STOCK at Warehouse
2
CMMG Mk4 AR-15 Upper Assembly Flat Top Aluminum Black 55BA22C
7-55BA22C
$102.84
IN STOCK at Warehouses
2,7
CMMG Mk4 AR-15 Upper Assembly Flat Top Aluminum Black 55BA22C
2-CMMG55BA22C
$96.40
IN STOCK at Warehouses
2,7
CORE15 TAC M4 Complete Upper Assembly BCG/Charging Handle Free Floating Rail Black 99102
2-CORE99102
$655.40
IN STOCK at Warehouse
2
CMMG Complete Upper Receiver .223 Rem/5.56 NATO 14.7 M4 Chrome Lined Barrel with Permamnt A2 Flash Hider 1:7 Twist Flat Top Black 55B12B1
2-CMMG55B12B1
$575.89
IN STOCK at Warehouse
2
AR-15 Complete Upper Assembly with 16  1x7  Nitride Coated M4 Barrel Chanmbered In 5.56 NATO,  Optics Ready, Bolt Carrier Group and Charging Handle
ARR-648
$499.97
IN STOCK at Warehouse
1
Optics Ready AR-15 Upper Assembly with Polished 16  Stainless M4 Barrel 5.56 NATO Chambered, Yankee Hill Machine Todd Jarrett Competition Series Free Float Rail, Phantom Flash Hider, Bolt Carrier Group and Charging Handle
ARR-651
$519.97
IN STOCK at Warehouse
1
Troy Industries M7 Upper Receiver 5.56mm Black SM7A-CUK-00BT-00
9-71877
$1,227.44
IN STOCK at Warehouse
9
AR-15 M4 Upper Assembly Complete JSE Surplus .223 Rem/5.56 NATO Flat Top Receiver 16  Chrome Moly Steel Barrel 1:9  Twist
ARR-520
$479.97
IN STOCK at Warehouse
1
AR-15 5.56 Complete Southpaw Flat Top Upper Carbine 1x9  M4 Barrel Railed Gas Block Standard Handguards
ARR-640
$499.97
IN STOCK at Warehouse
1
Bravo Company AR-15 M4 Upper Assembly with Laser T Marks Aluminum Black BCM4-UR-M4
2-BCM4-UR-M4
$105.14
IN STOCK at Warehouse
2
Chiappa M4-22 Complete Upper Receiver .22 Long Rifle 16  Barrel 10 Rounds 10UR M4-22 10UR
11-0409333
$302.80
IN STOCK at Warehouses
10,11,12,3,6
Chiappa M4-22 Complete Upper Receiver .22 Long Rifle 16  Barrel 10 Rounds 10UR M4-22 10UR
6-0409333
$302.80
IN STOCK at Warehouses
10,11,12,3,6
 
 
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