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Top Sellers

US Tactical Ind. Enhanced Stainless Steel 5.56/9mm Firing Pin Retainer
US Tactical Ind. Enhanced Stainless Steel 5.56/9mm Firing Pin Retainer
$9.99 $2.99
Recoil Technologies AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group
Recoil Technologies AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group
$199.99 $79.99
(12)
Faxon Firearms Magazine Marker Bands 300 Blackout
Faxon Firearms Magazine Marker Bands 300 Blackout
$12.49 $9.99
Davidson Defense
Davidson Defense "Sand Wasp" AR-15 Pistol Upper Receiver 7.5" .300 Blackout 4150 CMV QPQ Nitride 1-8T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$619.99 $199.99
Adaptive Tactical Stock AR-15 Finish Your Rifle Kit 5.56/.223/.300 BLKOUT/.350 Legend
Adaptive Tactical Stock AR-15 Finish Your Rifle Kit 5.56/.223/.300 BLKOUT/.350 Legend
$249.99 $179.99
MMC Armory AR-15 5.56/.223/.300/.350 Nitride Bolt Carrier Group - Nickel Boron Bolt and Cam Pin
MMC Armory AR-15 5.56/.223/.300/.350 Nitride Bolt Carrier Group - Nickel Boron Bolt and Cam Pin
$149.99 $79.99
FailZero M16 AR-15 Nickel Boron M16 Bolt Carrier Group BCG NIB
FailZero M16 AR-15 Nickel Boron M16 Bolt Carrier Group BCG NIB
$169.99 $149.99
(19)
Mercury Precision AR-15 PVD Rainbow Finish, M16, 5.56/.223, 9310 Bolt, Machined Extractor BCG
Mercury Precision AR-15 PVD Rainbow Finish, M16, 5.56/.223, 9310 Bolt, Machined Extractor BCG
$124.99 $119.99
Aero Precision AR-15 5.56 .223 300 Blackout BCG Black Nitride Aero Marked
Aero Precision AR-15 5.56 .223 300 Blackout BCG Black Nitride Aero Marked
$149.99 $127.99
Prime Weaponry AR-15 5.56/.223 Titanium Nitride Bolt Carrier Group - *Made in The USA*
Prime Weaponry AR-15 5.56/.223 Titanium Nitride Bolt Carrier Group - *Made in The USA*
$189.99 $134.99
Battle Arms Development AR-15/M16 Full Auto BCG - 5.56/.223/.300/.350
Battle Arms Development AR-15/M16 Full Auto BCG - 5.56/.223/.300/.350
$223.99 $135.00
MMC Combos Gauntlet Arms AR-15 Left Handed Billet Upper Receiver + Recoil Technologies Premium Left Handed M16 AR-15 Black Nitride Finish Bolt Carrier Group + AR-15 M4 Charging Handle Mil-Spec Quality
MMC Combos Gauntlet Arms AR-15 Left Handed Billet Upper Receiver + Recoil Technologies Premium Left Handed M16 AR-15 Black Nitride Finish Bolt Carrier Group + AR-15 M4 Charging Handle Mil-Spec Quality
$499.99 $219.99
Davidson Defense
Davidson Defense "Desman" AR-15 Pistol Upper Receiver 10.5" .300 Blackout 4150 CMV QPQ Nitride 1-8T Barrel 9.25" M-Lok Handguard (Assembled or Unassembled)
$594.99 $239.99

Manufacturer

  1. Home
  2. Calibers
  3. .300 Blackout
  4. Shop By

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.
  • AR-15 Upper Builds | .300 Blackout
  • Barrels
  • .300 Blackout - Bolt Carrier Groups
  • Finish Your Build Kits
  • Magazine - .300 Blackout
  • AR-15 .300 Blackout Upper Build Starter Kits

Products [113]

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FailZero M16 AR-15 Nickel Boron M16 Bolt Carrier Group BCG NIB
FailZero M16 AR-15 Nickel Boron M16 Bolt Carrier Group BCG NIB
(19)
$169.99 $149.99 Sale
In Stock
Add To Cart
Recoil Technologies AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group
Recoil Technologies AR-15 5.56/.223/.300/.350 Complete Bolt Carrier Group
(12)
$199.99 $79.99 Sale
In Stock
Add To Cart
Gauntlet Arms
Gauntlet Arms "Springer" AR-15 16" .300 BLK OUT, Pistol Gas, HBAR, 1:8 T, Phosphate Barrel
$199.99 $144.99 Sale
Out of Stock
Add To Cart
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
Add To Cart
US Tactical Ind. Enhanced Stainless Steel 5.56/9mm Firing Pin Retainer ** 2 Pack**
US Tactical Ind. Enhanced Stainless Steel 5.56/9mm Firing Pin Retainer ** 2 Pack**
$19.99 $4.49 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 **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
Add To Cart
Prime Weaponry AR-15 5.56/.223 Titanium Nitride Bolt Carrier Group - *Made in The USA*
Prime Weaponry AR-15 5.56/.223 Titanium Nitride Bolt Carrier Group - *Made in The USA*
$189.99 $134.99 Sale
In Stock
Add To Cart
Aero Precision AR-15 5.56 .223 300 Blackout BCG Black Nitride Aero Marked
Aero Precision AR-15 5.56 .223 300 Blackout BCG Black Nitride Aero Marked
$149.99 $127.99 Sale
In Stock
Add To Cart
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
Adaptive Tactical Stock AR-15 Finish Your Rifle Kit 5.56/.223/.300 BLKOUT/.350 Legend
Adaptive Tactical Stock AR-15 Finish Your Rifle Kit 5.56/.223/.300 BLKOUT/.350 Legend
$249.99 $179.99 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
$254.99 $184.99 Sale
In Stock
Add To Cart
US Tactical Ind. Enhanced Stainless Steel 5.56/9mm Firing Pin Retainer
US Tactical Ind. Enhanced Stainless Steel 5.56/9mm Firing Pin Retainer
$9.99 $2.99 Sale
In Stock
Add To Cart
Gauntlet Arms
Gauntlet Arms "Hovod" AR-15 10.5" .300 BLK OUT, Pistol Gas, Hbar, 1-8T Parkerized Barrel
$139.99 $99.99 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
Add To Cart
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
Add To Cart
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