.300 AAC Blackout (300 BLK)

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  • Wet-tumbled/polished, 300 AAC Blackout (300 BLK) brass sourced mainly from indoor ranges
  • May include a variety of manufacturers and headstamps
  • Because the 5.56/.223 case is commonly modified to create a 300 BLK case, this brass will more times than not contain modified 5.56/.223 cases and be twice fired (once as 5.56/.223 and once as 300 AAC Blackout)
  • Spent primers will still be intact in the cases and must be removed before beginning the reloading process
  • Extra brass cases will be included to make up for any stray calibers, unusable pieces, or other cosmetic defects that may slip through our screening process
  • We ship orders within one to two business days of receiving your order on our end.  Orders are shipped using USPS Priority Mail which includes free shipment tracking.
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.300 AAC Blackout

300 AAC Blackout (also referred to as 300 BLK, 7.62x35mm) is an intermediate cartridge developed by the United States Advanced Armament Corporation (AAC) for the M4 carbine. 300 Blackout was developed alongside engineers at Remington Defense. 300 Blackout development started in 2009, but most work was done in 2010, 300 Blackout was officially released in the year 2011. One of the main reasons for the 300 Blackout being designed was to combat what many seen as flaws in other large caliber cartridges used in the M4 platform. One of the big selling points of the 300 Blackout is many firearm fanatics already own a M4 platform that is chambered for .223/5.56, 300 Blackout uses the same platform and magazines, it just requires a barrel swap to complete the conversion. 300 Blackout was approved by SAAMI on January 17, 2011. That same year SSG Daniel Horner of the USAMU use 300 Blackout to win his fourth USPSA Multi Gun National Championship, giving it even more of a boost in popularity. 

Around July of 2015 the Netherlands’ Defense Material Organization submitted an order for 195 carbines chambered in 300 Blackout. In December of 2016 the order was fulfilled and the Netherlands acquired 195 integrally suppressed SIG MCX carbines, this being the first publicly known military user of the 300 Blackout. The following year in July of 2017 the United Kingdom  issued a 5 year contract (plus a 5 years additional option) to supply 300 Blackout in both supersonic and subsonic variations. 

300 Blackout was designed to achieve the energies of the AK-47 (7.62x39mm) while sticking to the normal M4 platform and not sacrificing magazine capacity. The 300 Blackout has an effective range of 460 meters, in terms of hit probability. Most firearm professionals all agree one of the biggest advantages of the 300 Blackout is its capability of switching between barrier penetrating, subsonic, and supersonic ammunition with a simple magazine change. Another impressive mention is the 300 Blackout cartridge is proven to be effective in barrels as short as 4.5 inches, that is shorter than some modern pistol barrels. 

There are tons of large and small companies that currently produce 300 Blackout ammunition in a number of different bullet weights and designs. Bullet weights typically range from 78 grains on the lighter end, and upwards of 200 grains on the high end. It is a common practice in the reloading community to trim once fired .223/5.56 NATO brass down to 300 Blackout height and then crimping the brass themselves to create a “homemade” 300 Blackout case. That being said it is very common to find .223/5.56 NATO headstamps mixed in with once fired 300 Blackout brass. 

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