The Daniel Defense 300 Blackout Barrel, 10.3 inches (brand part no. 36-116-06191-018), is a cold hammer-forged barrel built with Daniel Defense’s Strength to Weight, or S2W, profile and a pistol-length gas system. Cold hammer forging shapes the bore, chamber, lands, and grooves under intense hydraulic pressure from carbide steel hammers working around a mandrel, a process Daniel Defense has relied on for decades because it produces a defect-free bore and one of the most consistent chambers achievable, resulting in a barrel that’s both more accurate and longer-lasting than one cut or button rifled. Every Daniel Defense cold hammer-forged barrel, including this one, is made start to finish at the company’s facility in Black Creek, Georgia.

Key Specifications

• Chambered in .300 AAC Blackout, a versatile cartridge for both supersonic and subsonic loads.
• Cut to a 10.3 inch barrel length, built for a compact pistol-length AR build.
• Runs a pistol-length gas system, matched to the barrel’s short length.
• Machined with Daniel Defense’s Strength to Weight (S2W) heavy barrel profile.
• Cold hammer forged for a defect-free bore and highly consistent chamber.
• Manufactured start to finish in Black Creek, Georgia, keeping production fully in-house.
• Suited to a compact, maneuverable .300 Blackout pistol build.
• Backed by Daniel Defense‘s reputation for mil-spec-grade AR-platform barrels.
• Performs well with both supersonic and subsonic .300 Blackout loads.

Frequently Asked Questions

What gas system does this barrel use? It runs a pistol-length gas system, matched to its 10.3 inch length.

What manufacturing process does Daniel Defense use for this barrel? It is cold hammer forged, a process that produces a defect-free bore and a highly consistent chamber.

Buy the Daniel Defense 300 Blackout Barrel

Builders assembling a compact .300 Blackout pistol will get real accuracy and durability benefits from Daniel Defense’s cold hammer-forged process and heavy S2W profile. Order it through our Lubbock, Texas gun shop and browse more rifle barrels from Daniel Defense and other trusted brands.