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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

Davidson Defense AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group *Made In The USA*
Davidson Defense AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group *Made In The USA*
$105.99 $79.99
Davidson Defense AR-15 10.5
Davidson Defense AR-15 10.5" .300 BLK OUT, Pistol Gas, Hbar, 1-8T Parkerized Barrel
$94.99 $69.99
Stainless Steel Machined Firing Pin Retainer (Solid Piece, not Cotter Pin), 5.56 1 Pack
Stainless Steel Machined Firing Pin Retainer (Solid Piece, not Cotter Pin), 5.56 1 Pack
$4.99 $2.99
Davidson Defense Davidson Defense AR-15 16
Davidson Defense Davidson Defense AR-15 16" .300 BLK OUT, Pistol Gas, HBAR, 1:8 T, Phosphate Barrel
$109.99 $79.99
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
$89.99 $64.99
Davidson Defense AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group *Made In The USA*
Davidson Defense AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group *Made In The USA*
$104.99 $79.99
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
$39.99 $29.99
AR-15 5.56 NATO M16 Complete Bolt Carrier Group, FDE PVD, 9310 Bolt, 8620 Carrier, Chrome-Lined
AR-15 5.56 NATO M16 Complete Bolt Carrier Group, FDE PVD, 9310 Bolt, 8620 Carrier, Chrome-Lined
$198.99 $149.99

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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 [34]

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Davidson Defense AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group *Made In The USA*
Davidson Defense AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group *Made In The USA*
$105.99 $79.99 Sale
In Stock
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Davidson Defense Davidson Defense AR-15 16
Davidson Defense Davidson Defense AR-15 16" .300 BLK OUT, Pistol Gas, HBAR, 1:8 T, Phosphate Barrel
$109.99 $79.99 Sale
In 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- 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
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
$134.99 $99.99 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
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Stainless Steel Machined Firing Pin Retainer (Solid Piece, not Cotter Pin), 5.56 1 Pack
Stainless Steel Machined Firing Pin Retainer (Solid Piece, not Cotter Pin), 5.56 1 Pack
$4.99 $2.99 Sale
In Stock
Add To Cart
Davidson Defense AR-15 10.5
Davidson Defense AR-15 10.5" .300 BLK OUT, Pistol Gas, Hbar, 1-8T Parkerized Barrel
$94.99 $69.99 Sale
In 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
Out of Stock
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Davidson Defense Hermits AR-15 Pistol Upper Receiver 7.5
Davidson Defense Hermits AR-15 Pistol Upper Receiver 7.5" .300 Blackout 4150 CMV 1-8T Heavy Barrel 7" Smooth Tube Handguard
$159.99 $119.99 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
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
$114.99 $89.99 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
$89.99 $64.99 Sale
In Stock
Add To Cart
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)
$339.99 $254.99 Sale
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Davidson Defense 'Anthea' 7.5
Davidson Defense 'Anthea' 7.5" AR-15 .300 Blackout Manganese Phosphate Pistol Upper Build Kit
$184.99 $139.99 Sale
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Davidson Defense Grimace 7.5
Davidson Defense Grimace 7.5" AR-15 .300 Blackout Manganese Phosphate Pistol Upper Build Kit
$189.99 $144.99 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
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HEXMAG 30 Round AR-15 POLYHEX2 SERIES2 Magazine : FLAT DARK EARTH, .223, 5.56 x 45mm, 300 AAC Blackout
HEXMAG 30 Round AR-15 POLYHEX2 SERIES2 Magazine : FLAT DARK EARTH, .223, 5.56 x 45mm, 300 AAC Blackout
$19.99 $11.99 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
$204.99 $154.99 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
$214.99 $164.99 Sale
Out of Stock
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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)
$379.99 $284.99 Sale
Out of Stock
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Davidson Defense 'Flopzoom' 7.5
Davidson Defense 'Flopzoom' 7.5" AR-15 .300 Blackout Manganese Phosphate Pistol Upper Build Kit
$179.99 $134.99 Sale
In Stock
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Lancer Magazine, Flat Dark Earth, L5AWM .223 Rem/5.56 NATO FDE AR-15 30 Round Mag
Lancer Magazine, Flat Dark Earth, L5AWM .223 Rem/5.56 NATO FDE AR-15 30 Round Mag
$19.99 $17.99 Sale
In Stock
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