The .300 AAC Blackout cartridge was designed from the ground up for suppressed use, and the growing number of NFA-registered suppressor owners across the country has pushed demand for purpose-built uppers to new levels. AR15Parts.com, a Texas-based AR-15 components retailer operating out of Denison, now stocks 22 .300 Blackout upper configurations assembled in-house and ready to ship directly to buyers without an FFL transfer.
The expanded lineup spans three barrel lengths: 8 inches, 10.5 inches, and 16 inches. Short-barreled configurations at 8 and 10.5 inches are built around a pistol-length gas system and achieve complete powder burn in as little as 9 inches of barrel, making them well-suited for suppressed setups where hearing-safe performance with subsonic ammunition is the primary goal. The 16-inch configurations run a carbine-length gas system and maximize supersonic velocity for hunting and range applications, where the cartridge reaches approximately 2,200 feet per second with 125-grain loads and remains effective out to 300 yards.
"The 300 Blackout platform keeps growing because it does something no other mainstream AR caliber can match: it runs subsonic loads through a suppressor and produces a hearing-safe report without any parts changes," said a company representative at AR15Parts.com. "We built out this lineup so suppressor owners have real options across barrel lengths and barrel quality tiers, not just one or two configurations."
Barrels across the lineup come from four manufacturers: Wilson Combat, Ballistic Advantage, Satern, and the company's own in-house brand. Wilson Combat options include the Ranger Glass Bead stainless and Recon Fluted Glass Bead stainless barrels, both chambered in .300 Blackout with 1:8 twist rates optimized for stabilizing the heavy subsonic projectiles the cartridge is known for. Ballistic Advantage contributes DRP Modern Series barrels, while Satern Barrels provide medium stainless options for shooters prioritizing precision. All configurations are available with 10-, 12-, and 15-inch handguard rails and multiple muzzle device options, including A2 flash hiders, flash cans, and comp brakes.
Every upper leaves the Denison facility assembled, headspaced, and function-checked before shipping. AR15Parts.com builds each unit to the buyer's exact specifications rather than shipping factory-configured stock. Pricing runs from $307 for a 16-inch barreled upper with the house-brand parkerized barrel to $627 for a complete 16-inch upper with a Wilson Combat Recon Fluted barrel, BCG, and charging handle included.
One of the .300 Blackout's practical advantages for existing AR owners is its compatibility with standard 5.56 NATO bolt carrier groups. Buyers who already own a compatible BCG can order a barreled upper and complete their build without purchasing additional components. The upper drops onto any mil-spec AR-15 lower with no modification required.
AR15Parts.com ships most in-stock upper configurations within three to five business days with free shipping on orders over $99. The complete .300 Blackout upper catalog is available at ar15parts.com.
About AR15Parts.com
AR15Parts.com is an AR-15 and AR-10 components retailer based in Denison, Texas. The company assembles complete upper receivers in-house using barrels from Wilson Combat, Ballistic Advantage, Satern, Shaw, and other manufacturers, covering more than 19 caliber options. All uppers are headspaced and function-checked before shipping. AR15Parts.com serves individual builders and FFL-licensed dealer partners nationwide and has earned more than 1,700 five-star reviews. Reach the company at (888) 706-0633 or at ar15parts.com.
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Media Contact
AR15Parts.com
Address: 4000 Texoma Pkwy Denison, TX 75020
Phone: (888) 706-0633
Website: https://ar15parts.com/
Published by: Randy Rohde