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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*
$89.99 $59.99
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
$59.99 $44.99
MMC Combos MOAB Stock Finish Your Rifle Build Kit - 5.56/.223/.300/.350
MMC Combos MOAB Stock Finish Your Rifle Build Kit - 5.56/.223/.300/.350
$209.99 $154.99
Davidson Defense AR-15 Complete 5.56 NATO BCG, Radius Cut, 9310 Bolt, Nitride Gas Key, Flash Nitride Firing Pin, TiN Gold Finish
Davidson Defense AR-15 Complete 5.56 NATO BCG, Radius Cut, 9310 Bolt, Nitride Gas Key, Flash Nitride Firing Pin, TiN Gold Finish
$134.99 $89.99

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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 [31]

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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*
$89.99 $59.99 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
$149.99 $109.99 Sale
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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- 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)
$134.99 $99.99 Sale
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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
$134.99 $99.99 Sale
Out of Stock
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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
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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 $2.99 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
$134.99 $104.99 Sale
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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
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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
$119.99 $94.99 Sale
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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
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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
$114.99 $89.99 Sale
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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
$59.99 $44.99 Sale
In Stock
Add To Cart
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)
$404.99 $304.99 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
$204.99 $154.99 Sale
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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
$229.99 $169.99 Sale
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Davidson Defense 'Mercs' 16
Davidson Defense 'Mercs' 16" AR-15 .300 Blackout Manganese Phosphate Upper Build Kit
$234.99 $179.99 Sale
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Magpul PMAG AR-15 GEN M3 .300 BLK OUT - 30 Round Magazine
Magpul PMAG AR-15 GEN M3 .300 BLK OUT - 30 Round Magazine
$19.99 $14.99 Sale
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Davidson Defense
Davidson Defense "Boracite" Side Charging AR-15 Pistol Upper Receiver 8.5" .300 Blackout 4150 CMV 1-8T Barrel 9" M-Lok Handguard (Assembled or Unassembled)
$439.99 $329.99 Sale
Out of Stock
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Lancer L5AWM .223 Rem/5.56 NATO FDE AR-15 30 Round Mag, Flat Dark Earth
Lancer L5AWM .223 Rem/5.56 NATO FDE AR-15 30 Round Mag, Flat Dark Earth
$19.99 $17.99 Sale
Out of Stock
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MMC Combos MOAB Stock Finish Your Rifle Build Kit - 5.56/.223/.300/.350
MMC Combos MOAB Stock Finish Your Rifle Build Kit - 5.56/.223/.300/.350
$209.99 $154.99 Sale
In Stock
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MMC Combos CQB Stock Finish Your Rifle Build Kit - 5.56/.223/.300/.350
MMC Combos CQB Stock Finish Your Rifle Build Kit - 5.56/.223/.300/.350
$199.99 $154.99 Sale
In Stock
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MMC Combos Luth MBA 5 Stock Finish Your Rifle Build Kit - 5.56/.223/.300/.350
MMC Combos Luth MBA 5 Stock Finish Your Rifle Build Kit - 5.56/.223/.300/.350
$259.99 $159.99 Sale
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