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Shop By .300 Blackout


One of the most popular self defense and CQB calibers available on the market is the .300 Blackout, also commonly known as .300 AAC and .300 BLK. This round was developed with urban warfare in mind making it a great option for home defense but is also a blast to shoot at the range. Check out our MMC Armory conversion kits and complete uppers to make your build hassle free and at a great price.

Top Sellers

Recoil Technologies AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group *Made In The USA*
Recoil Technologies AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group *Made In The USA*
$99.99 $74.99
(12)
Recoil Technologies AR-15 .300 BlackOut Complete Bolt Carrier Group
Recoil Technologies AR-15 .300 BlackOut Complete Bolt Carrier Group
$99.99 $74.99
ELD Performance
ELD Performance "Khopesh" AR-15 16" .300 BLK OUT, Pistol Gas, 1:8T, Nitride Barrel
$109.99 $75.99
Guntec AR .308 Mini Slip Over Barrel Shroud with Multi Port Muzzle Brake - 5/8x24, Anodized Black
Guntec AR .308 Mini Slip Over Barrel Shroud with Multi Port Muzzle Brake - 5/8x24, Anodized Black
$44.99 $34.99
Davidson Defense Premium Left Handed M16 AR-15 Black Nitride Finish Bolt Carrier Group BCG
Davidson Defense Premium Left Handed M16 AR-15 Black Nitride Finish Bolt Carrier Group BCG
$279.99 $124.99
MMC Combos SB Tactical SBA3 Brace AR-15 Finish Your Pistol Kit - 5.56/.223/.300 BLKOUT/.350 Legend
MMC Combos SB Tactical SBA3 Brace AR-15 Finish Your Pistol Kit - 5.56/.223/.300 BLKOUT/.350 Legend
$329.99 $239.99
Gauntlet Arms AR-15 8.5
Gauntlet Arms AR-15 8.5" .300 Blackout, Pistol Gas, 1:7T, 4150 CrMoV, Nitride Government Profile Barrel
$79.99 $59.99
Davidson Defense
Davidson Defense "Pyrina" 7.5" AR-15 .300 Blackout Pistol Upper Build
$604.99 $199.99
Davidson Defense 'Buck Wild .300 Blackout w/SBA5' 7.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
Davidson Defense 'Buck Wild .300 Blackout w/SBA5' 7.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
$694.99 $389.99
MMC 'Lightshow II - Gold .300 Blackout' 16-inch AR-15 .300BLK Nitride Rifle Upper Build Kit
MMC 'Lightshow II - Gold .300 Blackout' 16-inch AR-15 .300BLK Nitride Rifle Upper Build Kit
$274.99 $179.99
Davidson Defense 'Dusk Drifter' 10.5
Davidson Defense 'Dusk Drifter' 10.5" AR-15 .300BLK Nitride Pistol Upper Build Kit
$249.99 $199.99
Davidson Defense 'Raptor Reaper' 8.5
Davidson Defense 'Raptor Reaper' 8.5" AR-15 .300BLK Nitride Pistol Upper Build Kit
$259.99 $169.99
Davidson Defense 'Shadow Stalker' 8.5
Davidson Defense 'Shadow Stalker' 8.5" AR-15 .300BLK Nitride KAK Pistol Full Build Kit
$474.99 $309.99

Manufacturer

  1. Home
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  3. Shop By .300 Blackout
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  • Barrels > .300 Blackout Compatible
  • Bolt Carrier Groups > .300 Blackout Compatible
  • Finish Your Build Kits > .300 Blackout Compatible
  • Magazines > .300 Blackout Compatible
  • Muzzle Devices > .300 Blackout Compatible
  • Upper Builds > .300 Blackout Compatible
  • Upper Build Starter Kits > .300 Blackout Compatible

Products [79]

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Recoil Technologies AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group *Made In The USA*
Recoil Technologies AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group *Made In The USA*
(12)
$99.99 $74.99 Sale
In Stock
Add To Cart
Bear Creek Arsenal AR-15 16
Bear Creek Arsenal AR-15 16" .300 BLK OUT, Pistol Gas, HBAR, 1:8 T, Phosphate Barrel
$82.99 $74.97 Sale
In Stock
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Davidson Defense Premium Left Handed M16 AR-15 Black Nitride Finish Bolt Carrier Group BCG
Davidson Defense Premium Left Handed M16 AR-15 Black Nitride Finish Bolt Carrier Group BCG
$279.99 $124.99 Sale
In Stock
Add To Cart
3 Gun Labs Inc. Ar-15 LMB Low Mass Aluminum 5.56 Nato .223 Rem 300 Blackout (BCG) Bolt Carrier Group **Very Durable Plasma Finish- Blue** Only 5.9 Oz Designed For 3 Gun Competition
3 Gun Labs Inc. Ar-15 LMB Low Mass Aluminum 5.56 Nato .223 Rem 300 Blackout (BCG) Bolt Carrier Group **Very Durable Plasma Finish- Blue** Only 5.9 Oz Designed For 3 Gun Competition
(1)
$299.99 $139.99 Sale
Out of Stock
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3 Gun Labs Inc. Ar-15 LMB Low Mass Aluminum 5.56 Nato .223 Rem 300 Blackout (BCG) Bolt Carrier Group **Very Durable Plasma Finish **Red Color** Only 5.9 Oz Designed For 3 Gun Competition
3 Gun Labs Inc. Ar-15 LMB Low Mass Aluminum 5.56 Nato .223 Rem 300 Blackout (BCG) Bolt Carrier Group **Very Durable Plasma Finish **Red Color** Only 5.9 Oz Designed For 3 Gun Competition
$299.99 $139.99 Sale
Out of Stock
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MMC Combos SB Tactical SBA3 Brace AR-15 Finish Your Pistol Kit - 5.56/.223/.300 BLKOUT/.350 Legend
MMC Combos SB Tactical SBA3 Brace AR-15 Finish Your Pistol Kit - 5.56/.223/.300 BLKOUT/.350 Legend
$329.99 $239.99 Sale
In Stock
Add To Cart
MMC Combos KAK Shockwave 2.0-M AR-15 Finish Your Pistol Build Kit - 5.56/.223/.300 BLKOUT/.350 Legend
MMC Combos KAK Shockwave 2.0-M AR-15 Finish Your Pistol Build Kit - 5.56/.223/.300 BLKOUT/.350 Legend
$284.99 $179.99 Sale
In Stock
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US Tactical Ind. Enhanced Stainless Steel 5.56/9mm Firing Pin Retainer
US Tactical Ind. Enhanced Stainless Steel 5.56/9mm Firing Pin Retainer
$4.99 $2.49 Sale
In Stock
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Bear Creek Arsenal AR-15 10.5
Bear Creek Arsenal AR-15 10.5" .300 BLK OUT, Pistol Gas, Hbar, 1-8T Parkerized Barrel
$81.99 $74.99 Sale
Out of Stock
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ELD Performance
ELD Performance "Scalpel" AR-15 10.5" .300 Blkout, Pistol Gas, Hbar, 1-8T Stainless Steel Barrel
$139.99 $99.99 Sale
Out of Stock
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MMC Combos KAK Blade AR-15 Finish Your Pistol Build Kit - 5.56/.223/.300 BLKOUT/.350 Legend
MMC Combos KAK Blade AR-15 Finish Your Pistol Build Kit - 5.56/.223/.300 BLKOUT/.350 Legend
$269.99 $194.99 Sale
In Stock
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ELD Performance AR-15
ELD Performance AR-15 "Vader" 300 Blackout 8.5" Pistol gas Mid Weight Profile 1:8T Nitride Barrel
$116.99 $89.99 Sale
Out of Stock
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3 Gun Labs Inc. AR-15 LMB Low Mass Aluminum 5.56 Nato .223 Rem 300 BLK OUT (BCG) Bolt Carrier Group **Very Durable Plasma Finish- Gold**
3 Gun Labs Inc. AR-15 LMB Low Mass Aluminum 5.56 Nato .223 Rem 300 BLK OUT (BCG) Bolt Carrier Group **Very Durable Plasma Finish- Gold**
$299.99 $139.99 Sale
Out of Stock
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ELD Performance
ELD Performance "Madcap" AR-15 7.5" .300 BLK OUT, Pistol Gas, Hbar, 1-7 T Stainless Steel Barrel
$119.99 $79.99 Sale
Out of Stock
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Bear Creek Arsenal AR-15 7.5
Bear Creek Arsenal AR-15 7.5" .300 BLK OUT, Pistol Gas, Hbar, 1-8 T Phosphate Barrel
$78.99 $64.99 Sale
Out of Stock
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Magpul AR-15 MOE Stock and Grip Finish Your Rifle Build Kit - 5.56/.223/.300/.350
Magpul AR-15 MOE Stock and Grip Finish Your Rifle Build Kit - 5.56/.223/.300/.350
$314.99 $199.99 Sale
In Stock
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Davidson Defense
Davidson Defense "Disaster" AR-15 Pistol Upper Receiver 8.5" .300 Blackout 4150 CMV QPQ Nitride 1-8T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$574.99 $424.99 Sale
Out of Stock
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Davidson Defense 'Anthea' 7.5
Davidson Defense 'Anthea' 7.5" AR-15 .300 Blackout Manganese Phosphate Pistol Upper Build Kit
$559.99 $244.99 Sale
Out of Stock
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MMC Combos UTG Pro AR-15 Finish Your Rifle Build Kit - 5.56/.223/.300/.350
MMC Combos UTG Pro AR-15 Finish Your Rifle Build Kit - 5.56/.223/.300/.350
$254.99 $184.99 Sale
In Stock
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MMC Combos Adaptive Tactical AR-15 Finish Your Rifle Build Kit - 5.56/.223/.300/.350
MMC Combos Adaptive Tactical AR-15 Finish Your Rifle Build Kit - 5.56/.223/.300/.350
$274.99 $174.99 Sale
In Stock
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Davidson Defense 'Ivy' 7.5
Davidson Defense 'Ivy' 7.5" AR-15 .300 Blackout Manganese Phosphate Pistol Upper Build Kit
$569.99 $254.99 Sale
Out of Stock
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Davidson Defense 'Mercs' 16
Davidson Defense 'Mercs' 16" AR-15 .300 Blackout Manganese Phosphate Upper Build Kit
$539.99 $224.99 Sale
Out of Stock
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Davidson Defense 'Nexuiz' 16
Davidson Defense 'Nexuiz' 16" AR-15 .300 Blackout Manganese Phosphate Upper Build Kit
$529.99 $214.99 Sale
In Stock
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Davidson Defense 'Granite' 16
Davidson Defense 'Granite' 16" AR-15 .300 Blackout Manganese Phosphate Upper Build Kit
$519.99 $204.99 Sale
In Stock
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