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300 aac blackout upper

Looking for 300 aac blackout upper? We have thousands of rifles, handguns, and shotguns in stock. If you don't find what you are looking for on this page, check out the categories listed on the left side for more guns, ammo, and accessories.

We now sell firearms from all of the popular manufacturers including Glock, S&W, Sig Sauer, Colt, and many others. If you need a gun for personal protection, hunting, competition or just plinking, we've got it at the best price you'll find anywhere.

Advanced Armament Corp .300 AAC Blackout AR-15 Upper 16  Barrel KAC URX Rail AAC Blackout 51T Brake 101716
2-AACO101716
$954.68
IN STOCK at Warehouses
2,3
AAC AR-15 Complete Upper Assembly .300 AAC Blackout 16  Nitride Barrel Knight's Armament Quad Rail AAC 51-T Flash Hider Black Finish 101716
76289
$974.16
IN STOCK at Warehouse
4
Advanced Armament Corp .300 AAC Blackout Upper Receiver 12.5  Barrel Quad Rail Black 102129
92693
$974.16
IN STOCK at Warehouse
4
AAC AR-15 Complete Upper Assembly .300 BLK 16  Barrel 1:7 Twist KAC URX Rail BLACKOUT Flash Hider Black 101716
3-0406442
$979.03
IN STOCK at Warehouses
2,3
Advanced Armament Corp MPW Complete Upper Assembly .300 AAC Blackout 9  Barrel Carbine Length Gas KAC URX Rail Black 100884
3-0406444
$979.03
IN STOCK at Warehouse
3
CMMG AR-15 Complete Upper Assembly .300 AAC Blackout 16  Barrel A2 Front Sight M4 Handguards Black Finish 30BF8C0
9-80611
$595.85
IN STOCK at Warehouses
2,9
CMMG AR-15 Complete Upper Assembly .300 AAC Blackout 16  Barrel A2 Front Sight M4 Handguards Black Finish 30BF8C0
2-CMMG30BF8C0
$545.97
IN STOCK at Warehouses
2,9
DPMS Panther Arms 300 AAC Blackout AR-15 Semi Auto Rifle .300 AAC Blackout 16  Heavy Barrel 30 Rounds Aluminum Free Float Tube Collapsible Stock Black RFA3-300SR
7-GRFA3300SR
$971.19
IN STOCK at Warehouse
7
CMMG AR-15 Complete Upper Assembly .300 AAC Blackout 16  Barrel Carbine Length Gas K9 Quad Rail Free Float Tube Black 30BF827
85442
$660.15
IN STOCK at Warehouse
4
CMMG MK4T AR-15 Complete Upper 300 AAC Blackout 16  Stainless Barrel KeyMod Hand Guard 30BC353
2-CMMG30BC353
$646.00
IN STOCK at Warehouse
2
DRD Tactical U300-BLK Upper .300 AAC Blackout 16  Barrel Pistol Length Gas System Black Does Not Include BCG or Charging Handle U300-BLK
2-DRDU300BLK
$857.49
IN STOCK at Warehouses
2,4
DRD Tactical U300-BLK Upper .300 AAC Blackout 16  Barrel Pistol Length Gas System Black Does Not Include BCG or Charging Handle U300-BLK
92230
$1,012.00
IN STOCK at Warehouses
2,4
Advanced Armament Corporation AR-15 .300 AAC Blackout Complete Upper Assembly 16  Threaded Barrel URX Rail Black 101716
7-101716
$974.16
IN STOCK at Warehouse
7
Noveske AR-15 Complete Upper Assembly .300 AAC Blackout 16  Barrel 1:8  Twist Pistol Length Gas System 10  Free Floated Quad Rail Black U-16-300BLK
2-NVU-16-300BLK
$1,494.11
IN STOCK at Warehouse
2
Advanced Armament Corporation AR-15 .300 AAC Blackout Complete Upper Assembly 12.5  Threaded Barrel URX Rail Black 102129
7-102129
$974.16
IN STOCK at Warehouse
7
Advanced Armament Corporation AR-15 .300 AAC Blackout Complete Upper Assembly 9  Threaded Barrel URX Rail Black 100884
7-100884
$974.16
IN STOCK at Warehouse
7
2 Vets Arms Semi Auto Rifle .300 Blackout 16  Stainless Barrel 30 Rounds Quad Rail Side Charging Handle Black Finish 2VA300BLK
82458
$1,384.90
IN STOCK at Warehouse
4
CMMG AR-15 Semi Auto Rifle .300 AAC Blackout 16  M300 Profile Barrel Revolution Handguard Collapsible Stock Black 30AF8DF
7-G30AF8DF
$904.59
IN STOCK at Warehouse
7
DRD Tactical CDR-15 Semi Auto Rifle 16  Barrel .300 AAC Blackout 30 Rounds Magpul CTR Stock Black Finish CDR-15-300BLK
2-DRDCDR15-300
$1,822.50
IN STOCK at Warehouses
2,4
DRD Tactical CDR-15 Semi Auto Rifle 16  Barrel .300 AAC Blackout 30 Rounds Magpul CTR Stock Black Finish CDR-15-300BLK
92227
$1,895.75
IN STOCK at Warehouses
2,4
CMMG AR-15 Mk4T Complete Upper Receiver .300 AAC Blackout 16  Barrel Keymod Handguard Black 30B129A
2-CMMG30B129A
$624.76
IN STOCK at Warehouses
2,7
CMMG AR-15 Mk4T Complete Upper Receiver .300 AAC Blackout 16  Barrel Keymod Handguard Black 30B129A
7-30B129A
$623.35
IN STOCK at Warehouses
2,7
Black Dawn AR-15 Semi Auto Rifle .300 AAC Blackout 16  Barrel 30 Rounds Magpul MOE Stock Magpul Pistol Grip OD Green Furniture Finish BDR-15-ODG
9-100885
$1,274.00
IN STOCK at Warehouse
9
Advanced Armament Corp .300 AAC Blackout Barrel with Gas System 101719
7-101719
$400.78
IN STOCK at Warehouse
7
CMMG AR-15 Semi Auto Carbine .300 AAC Blackout 16  Barrel 1:8 Twist 30 Rounds Flat Top Upper Magpul Rear Sight A2 6 Position Stock Flash Hider Black Finish
7-G30AF884
$804.69
IN STOCK at Warehouses
7,9
CMMG AR-15 Semi Auto Carbine .300 AAC Blackout 16  Barrel 1:8 Twist 30 Rounds Flat Top Upper Magpul Rear Sight A2 6 Position Stock Flash Hider Black Finish
9-89595
$827.05
IN STOCK at Warehouses
7,9
S&W M&P15 .300 Whisper/.300 Blackout Upper Assembly 16
10-0409313
$754.05
IN STOCK at Warehouses
10,6,7
S&W M&P15 .300 Whisper/.300 Blackout Upper Assembly 16
6-0409313
$766.31
IN STOCK at Warehouses
10,6,7
S&W M&P15 .300 Whisper/.300 Blackout Upper Assembly 16
7-812012Z
$701.50
IN STOCK at Warehouses
10,6,7
CMMG AR-15 Semi Auto Rifle .300 AAC Blackout 16  M300 Profile Stainless Steel Barrel Low Profile Carbine Gas System Mid Length Handguard Collapsible Stock Black 30A77E1
10-0137424
$976.79
IN STOCK at Warehouses
10,11,12,3,6,9
CMMG AR-15 Semi Auto Rifle .300 AAC Blackout 16  M300 Profile Stainless Steel Barrel Low Profile Carbine Gas System Mid Length Handguard Collapsible Stock Black 30A77E1
9-89593
$950.08
IN STOCK at Warehouses
10,11,12,3,6,9
CMMG AR-15 Semi Auto Rifle .300 AAC Blackout 16  M300 Profile Stainless Steel Barrel Low Profile Carbine Gas System Mid Length Handguard Collapsible Stock Black 30A77E1
6-0137424
$976.79
IN STOCK at Warehouses
10,11,12,3,6,9
CMMG AR-15 Semi Auto Rifle .300 AAC Blackout 16  M300 Profile Stainless Steel Barrel Low Profile Carbine Gas System Mid Length Handguard Collapsible Stock Black 30A77E1
3-0137424
$976.79
IN STOCK at Warehouses
10,11,12,3,6,9
CMMG AR-15 Semi Auto Rifle .300 AAC Blackout 16  M300 Profile Stainless Steel Barrel Low Profile Carbine Gas System Mid Length Handguard Collapsible Stock Black 30A77E1
11-0137424
$976.79
IN STOCK at Warehouses
10,11,12,3,6,9
CMMG AR-15 Semi Auto Rifle .300 AAC Blackout 16  M300 Profile Stainless Steel Barrel Low Profile Carbine Gas System Mid Length Handguard Collapsible Stock Black 30A77E1
12-0137424
$976.79
IN STOCK at Warehouses
10,11,12,3,6,9
CMMG AR-15 Complete Upper Receiver .300 BLK 16  Stainless Steel Barrel 1:7 Twist Mid Length Handguard Low Profile Gas Block 30B7784
9-89599
$662.35
IN STOCK at Warehouse
9
Advanced Armament Corp Muzzle Brake Non-Mount Single Chamber .300 AAC Blackout/7.62 5/8x24 TPI Matte Black 101732
3-1030447
$60.16
IN STOCK at Warehouse
3
CMMG AR-15 Semi Auto Rifle .300 AAC Blackout 16  M300 Profile Barrel 30 Rounds M4 Hand Guard Railed Gas Block Collapsible stock 30AF83C
2-CMMG30AF8C3
$833.47
IN STOCK at Warehouses
10,11,12,2,3,6,8
CMMG AR-15 Semi Auto Rifle .300 AAC Blackout 16  M300 Profile Barrel 30 Rounds M4 Hand Guard Railed Gas Block Collapsible stock 30AF83C
3-0136445
$850.58
IN STOCK at Warehouses
10,11,12,2,3,6,8
CMMG AR-15 Semi Auto Rifle .300 AAC Blackout 16  M300 Profile Barrel 30 Rounds M4 Hand Guard Railed Gas Block Collapsible stock 30AF83C
8-CMMG-30AF8C3
$800.93
IN STOCK at Warehouses
10,11,12,2,3,6,8
CMMG AR-15 Semi Auto Rifle .300 AAC Blackout 16  M300 Profile Barrel 30 Rounds M4 Hand Guard Railed Gas Block Collapsible stock 30AF83C
6-0136445
$850.58
IN STOCK at Warehouses
10,11,12,2,3,6,8
CMMG AR-15 Semi Auto Rifle .300 AAC Blackout 16  M300 Profile Barrel 30 Rounds M4 Hand Guard Railed Gas Block Collapsible stock 30AF83C
10-0136445
$850.58
IN STOCK at Warehouses
10,11,12,2,3,6,8
CMMG AR-15 Semi Auto Rifle .300 AAC Blackout 16  M300 Profile Barrel 30 Rounds M4 Hand Guard Railed Gas Block Collapsible stock 30AF83C
11-0136445
$850.58
IN STOCK at Warehouses
10,11,12,2,3,6,8
CMMG AR-15 Semi Auto Rifle .300 AAC Blackout 16  M300 Profile Barrel 30 Rounds M4 Hand Guard Railed Gas Block Collapsible stock 30AF83C
12-0136445
$850.58
IN STOCK at Warehouses
10,11,12,2,3,6,8
CMMG, Inc. MK4 RCE AR-15 .300 BLK 16  416 Stainless Steel Barrel SV Muzzle Brake Flat Top Free Float Keymod Handguard Upper Receiver Black 30BC3A7
8-CMMG-30BC3A7
$719.19
IN STOCK at Warehouse
8
CMMG Mk4 RCE Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Rounds KeyMod Hand Guard Black 30AC33B
2-CMMG30AC33B
$1,154.99
IN STOCK at Warehouses
2,8
CMMG Mk4 RCE Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Rounds KeyMod Hand Guard Black 30AC33B
8-CMMG-30AC33B
$1,201.32
IN STOCK at Warehouses
2,8
CORE15 MOE M4 Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Rounds OD Green Magpul MOE Stock and Grip with Black Receiver and Barrel 100597
2-CORE100597
$1,038.83
IN STOCK at Warehouse
2
CMMG. Inc. MK4T AR-15 Semi Auto Rifle .300 BLK 16  Medium Weight Tapered Profile 1:8  Twist Barrel RKM11 KeyMod Handguard Collapsible Stock Black 30A124D
8-CMMG-30A124D
$865.88
IN STOCK at Warehouses
7,8
CMMG. Inc. MK4T AR-15 Semi Auto Rifle .300 BLK 16  Medium Weight Tapered Profile 1:8  Twist Barrel RKM11 KeyMod Handguard Collapsible Stock Black 30A124D
7-G30A124D
$881.03
IN STOCK at Warehouses
7,8
Diamondback DB15300 Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Rounds Collapsible Stock Flat Dark Earth DB15300FDE
3-0137445
$936.76
IN STOCK at Warehouses
12,3,6
Diamondback DB15300 Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Rounds Collapsible Stock Flat Dark Earth DB15300FDE
6-0137445
$936.76
IN STOCK at Warehouses
12,3,6
Diamondback DB15300 Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Rounds Collapsible Stock Flat Dark Earth DB15300FDE
12-0137445
$936.76
IN STOCK at Warehouses
12,3,6
Noveske N4 Lo-Pro AR-15 Semi Auto Rifle .300 AAC Blackout 16  Barrel 30 Rounds Black MOE Grip IMOD Stock Quad Rail Blackout 51T Flash Suppressor Black Finish R-16-300BLK
2-NVR-16-300BLK
$2,522.34
IN STOCK at Warehouse
2
Diamondback DB15B300 Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Round Capacity Polymer Stock Black DB15B300
2-DB15B300
$903.54
IN STOCK at Warehouses
12,2,3,4,7,8,9
Diamondback DB15B300 Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Round Capacity Polymer Stock Black DB15B300
8-DBF-DB15B300
$832.44
IN STOCK at Warehouses
12,2,3,4,7,8,9
Diamondback DB15B300 Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Round Capacity Polymer Stock Black DB15B300
7-GDB15B300
$935.39
IN STOCK at Warehouses
12,2,3,4,7,8,9
Diamondback DB15B300 Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Round Capacity Polymer Stock Black DB15B300
9-106132
$958.00
IN STOCK at Warehouses
12,2,3,4,7,8,9
Diamondback DB15B300 Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Round Capacity Polymer Stock Black DB15B300
3-0137449
$821.39
IN STOCK at Warehouses
12,2,3,4,7,8,9
Diamondback DB15B300 Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Round Capacity Polymer Stock Black DB15B300
85450
$831.39
IN STOCK at Warehouses
12,2,3,4,7,8,9
Diamondback DB15B300 Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Round Capacity Polymer Stock Black DB15B300
12-0137449
$821.39
IN STOCK at Warehouses
12,2,3,4,7,8,9
S&W M&P15 Semi Auto Rifle .300 Whisper 16  Melonite Barrel 10 Rounds Collapsible CAR Stock Flattop Realtree APG Camo 811300
10-0135796
$932.40
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
S&W M&P15 Semi Auto Rifle .300 Whisper 16  Melonite Barrel 10 Rounds Collapsible CAR Stock Flattop Realtree APG Camo 811300
11-0135796
$932.40
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
S&W M&P15 Semi Auto Rifle .300 Whisper 16  Melonite Barrel 10 Rounds Collapsible CAR Stock Flattop Realtree APG Camo 811300
12-0135796
$932.40
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
S&W M&P15 Semi Auto Rifle .300 Whisper 16  Melonite Barrel 10 Rounds Collapsible CAR Stock Flattop Realtree APG Camo 811300
3-0135796
$932.40
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
S&W M&P15 Semi Auto Rifle .300 Whisper 16  Melonite Barrel 10 Rounds Collapsible CAR Stock Flattop Realtree APG Camo 811300
6-0135796
$932.40
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
S&W M&P15 Semi Auto Rifle .300 Whisper 16  Melonite Barrel 10 Rounds Collapsible CAR Stock Flattop Realtree APG Camo 811300
7-G811300
$932.40
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
S&W M&P15 Semi Auto Rifle .300 Whisper 16  Melonite Barrel 10 Rounds Collapsible CAR Stock Flattop Realtree APG Camo 811300
77965
$932.40
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
S&W M&P15 Semi Auto Rifle .300 Whisper 16  Melonite Barrel 10 Rounds Collapsible CAR Stock Flattop Realtree APG Camo 811300
8-SW-811300
$932.40
IN STOCK at Warehouses
10,11,12,2,3,4,6,7,8
Daniel Defense DDM4 V5 Complete Upper Assembly .300 AAC Blackout 16  Barrel Carbine length Gas 12  Quad Rail Black 23-123-08125-047
2-DD23-123-08125-047
$961.40
IN STOCK at Warehouse
2
PWS MK1 Mod 1 Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Rounds Magpul MOE Stock and Grip Black M116RB1B
2-PWSM116RB1B
$1,899.95
IN STOCK at Warehouse
2
Diamondback DB15300 Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Round Capacity Polymer Stock Flat Dark Earth DB15300FDE
8-DBF-DB15300FDE
$854.64
IN STOCK at Warehouses
4,8
Diamondback DB15300 Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Round Capacity Polymer Stock Flat Dark Earth DB15300FDE
85448
$902.25
IN STOCK at Warehouses
4,8
Bushmaster AR-15 Lower Reciever 6 Position Collapsible Stock A2 Grip Aluminum Black 92952
3-0135831
$319.36
IN STOCK at Warehouses
12,3,4,8
Bushmaster AR-15 Lower Reciever 6 Position Collapsible Stock A2 Grip Aluminum Black 92952
8-BF-92952
$311.54
IN STOCK at Warehouses
12,3,4,8
Bushmaster AR-15 Lower Reciever 6 Position Collapsible Stock A2 Grip Aluminum Black 92952
80943
$312.13
IN STOCK at Warehouses
12,3,4,8
Bushmaster AR-15 Lower Reciever 6 Position Collapsible Stock A2 Grip Aluminum Black 92952
12-0135831
$319.36
IN STOCK at Warehouses
12,3,4,8
Advanced Armament Corp MPW Semi Auto Pistol 300 Blackout 9  Barrel 30 Rounds Magpul MOE Grip Nickel Boron BCG Geissle Trigger Black 103585
2-AACO103585
$1,319.99
IN STOCK at Warehouse
2
Core15 CORE30 MOE Semi Automatic Rifle .300 Blackout 16  Barrel 20 Round Capacity Magpul Stock and Grip Matte Black 100546
3-0137779
$1,063.93
IN STOCK at Warehouses
2,3
Core15 CORE30 MOE Semi Automatic Rifle .300 Blackout 16  Barrel 20 Round Capacity Magpul Stock and Grip Matte Black 100546
2-CORE100334
$1,048.39
IN STOCK at Warehouses
2,3
Daniel Defense V5 M4 Carbine Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Round Capacity Magpul MOE Stock DDM4 Rail 12.0 Black 02-123-08165-047
2-DD02-123-08165-047
$1,355.20
IN STOCK at Warehouse
2
AAC MPW Semi Automatic Rifle .300 AAC Blackout 16  Barrel 30 Round Capacity Magpul CTR Stock Matte Black 101997
7-G101997
$1,443.20
IN STOCK at Warehouses
4,7
 
 
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