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You are here:Home > BARRELS > .300BLK Barrels
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8" to 12.5" Barrels 14.5" to 16" Barrels
Barrels up to 16" chambered in .300BLK!
All NFA rules apply for barrels under 16", it is the buyer's responsibility to make sure they comply with all NFA rules and applicable laws.
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Radical Firearms 16" 300 AAC Pistol Gas 1-8 Twist 4150V CMMG 16" 416 Stainless Steel Barrel - .300BLK - M300 Profile Yankee Hill 16" .300 Blackout Barrel - Threaded

Our Price:
$129.95
In Stock
(7)

Our Price:
$199.99
In Stock
(1)

Our Price:
$194.99
In Stock
(10)
Radical Firearms 16" 300 AAC Pistol Gas 1-8 Twist 4150V - 16300P1-8 CMMG 16" 416 Stainless Steel Barrel - .300BLK - M300 Profile - 30D770A Yankee Hill 16" .300 Blackout Barrel - Threaded - YHM-70-T
  • Manufacturer: Radical Firearms
  • Chamber: .300BLK
  • Fluted: No
  • Barrel Length: 16"
  • Twist Rate: 1:8
  • Gas System: Pistol
  • Diameter at Gas Port: 0.750"
  • Thread Pitch: 5/8x24
  • Material: 4150 Chrome Moly Vanadium Steel
  • Finish: Melonite
  • Process: Button Rifled
  • Barrel Lining: Melonite
  • Barrel Extension: A4
  • Assembly: Stripped
  • Weight: 1lb 15.3oz
  • Manufacturer: CMMG
  • Chamber: .300BLK
  • Contour: M300
  • Fluted: No
  • Barrel Length: 16"
  • Twist Rate: 1:7
  • Gas System: Carbine
  • Diameter at Gas Port: 0.750"
  • Thread Pitch: 5/8x24
  • Feed Ramps: M4
  • Material: 416 Stainless Steel
  • Finish: Stainless Steel
  • Process: Button Rifled
  • Barrel Lining: Stainless Steel
  • Barrel Extension: A4
  • Assembly: Stripped
  • Weight: N/A
  • Manufacturer: Yankee Hill Machine
  • Chamber: .300BLK
  • Contour: Medium
  • Fluted: No
  • Barrel Length: 16"
  • Twist Rate: 1:8
  • Gas System: Carbine Length
  • Diameter at Gas Port: 0.750"
  • Thread Pitch: 5/8x24
  • Feed Ramps: M4
  • Material: 4140 Chrome Moly Vanadium Steel
  • Finish: Melonite QPQ
  • Process: N/A
  • Barrel Lining: Melonite QPQ
  • Barrel Extension: M4
  • Assembly: Stripped
  • Weight: 26.2oz
Yankee Hill 16" .300 Blackout Barrel - Threaded Fluted CMMG Barrel Sub-Assm, 8.0" MC 4140CM SBN, 300 BLK CMMG 16.1" .300BLK Barrel Multi-Role Profile - 4140CM - Salt Bath Nitride

Our Price:
$204.50
In Stock
(3)

Our Price:
$169.95
In Stock
(5)

Our Price:
$189.95
In Stock
(1)
Yankee Hill 16" .300 Blackout Barrel - Threaded Fluted - YHM-70-TF CMMG Barrel Sub-Assm, 8.0" MC 4140CM SBN, 300 BLK- 30D810A CMMG 16.1" .300BLK Barrel Multi-Role Profile - 4140CM - Salt Bath Nitride - 30DF80A
  • Manufacturer: Yankee Hill Machine
  • Chamber: .300BLK
  • Contour: Medium
  • Fluted: Yes
  • Barrel Length: 16"
  • Twist Rate: 1:8
  • Gas System: Carbine Length
  • Diameter at Gas Port: .750"
  • Thread Pitch: 5/8x24
  • Feed Ramps: M4
  • Material: 4140 Chrome Moly Vanadium Steel
  • Finish: Melonite QPQ
  • Process: N/A
  • Barrel Lining: Melonite QPQ
  • Barrel Extension: M4
  • Assembly: Stripped
  • Weight: 26.2oz
  • Manufacturer: CMMG
  • Chamber: .300BLK
  • Contour: Medium
  • Fluted: No
  • Barrel Length: 8.0"
  • Twist Rate: 1:7
  • Gas System: Pistol Length
  • Diameter at Gas Port: 0.750"
  • Thread Pitch: 5/8x24
  • Feed Ramps: M4
  • Material: 4140 CrMo
  • Finish: Salt Bath Nitride
  • Process: Button Rifled
  • Barrel Lining: Salt Bath Nitride
  • Barrel Extension: A4
  • Assembly: Stripped
  • Weight: 14.6oz
  • Manufacturer: CMMG
  • Chamber: .300BLK
  • Contour: Multi Role Profile
  • Fluted: No
  • Barrel Length: 16.1"
  • Twist Rate: 1:7
  • Gas System: Carbine
  • Diameter at Gas Port: 0.750"
  • Thread Pitch: 5/8x24
  • Feed Ramps: M4
  • Material: 4140 Chrome Moly
  • Finish: Salt Bath Nitride
  • Process: Button Rifled
  • Barrel Lining: Salt Bath Nitride
  • Barrel Extension: A4
  • Assembly: Stripped
  • Weight: 28.8oz
Daniel Defense 10.3" .300BLK CHF Barrel - S2W - Pistol Odin Works 300 Blackout Barrel 16.1" Carbine Length Daniel Defense 16" .300BLK CHF Barrel - S2W - Carbine

Our Price:
$274.99
In Stock

Our Price: $250.00
Sale Price: $212.50
You save $37.50!
In Stock
(1)

Our Price:
$274.99
In Stock
Daniel Defense 10.3" .300BLK CHF Barrel - S2W - Pistol - 07-077-16176-018 Odin Works 300 Blackout Barrel 16.1" Carbine Leghth- B-300-16 Daniel Defense 16" .300BLK CHF Barrel - S2W - Carbine - 36-116-22022-107
  • Manufacturer: Daniel Defense
  • Chamber: .300BLK
  • Contour: S2W
  • Fluted: No
  • Barrel Length: 10.3"
  • Twist Rate: 1:8
  • Gas System: Pistol Length
  • Diameter at Gas Port: 0.750"
  • Thread Pitch: 5/8x24
  • Feed Ramps: M4
  • Material: Mil-Spec Chrome Moly Vanadium Steel
  • Finish: Salt Bath Nitride
  • Process: Cold Hammer Forged
  • Barrel Lining: Salt Bath Nitride
  • Barrel Extension: A4
  • Assembly: Stripped
  • Weight: 20.64oz
  • Manufacturer: Odin Works
  • Chamber: .300BLK
  • Contour: Medium Profile
  • Fluted: No
  • Barrel Length: 16.1"
  • Twist Rate: 1:8
  • Gas System: Carbine
  • Diameter at Gas Port: 0.750"
  • Thread Pitch: 5/8x24
  • Feed Ramps: M4
  • Material: 416 Stainless Steel
  • Finish: Stainless
  • Process: Button Rifled
  • Barrel Lining: Stainless
  • Barrel Extension: A4
  • Assembly: Stripped
  • Weight: 28.6oz
  • Manufacturer: Daniel Defense
  • Chamber: .300BLK
  • Contour: S2W
  • Fluted: No
  • Barrel Length: 16"
  • Twist Rate: 1:8
  • Gas System: Carbine Length
  • Diameter at Gas Port: 0.750"
  • Thread Pitch: 5/8x24
  • Feed Ramps: M4
  • Material: Mil-Spec Chrome Moly Vanadium Steel
  • Finish: Salt Bath Nitride
  • Process: Cold Hammer Forged
  • Barrel Lining: Salt Bath Nitride
  • Barrel Extension: A4
  • Assembly: Stripped
  • Weight: 36.64oz
Spikes Tactical ST- Lothar Walther 16" .300BLK Medium Profile Stainless Steel Barrel 1:8 Twist

Our Price:
$299.77
(Out of Stock)
(1)
Spikes Tactical ST- Lothar Walther 16" Medium Profile Stainless Steel Barrel 1:8 Twist - SB31603-MP
  • Manufacturer: Lothar Walther & Spikes Tactical
  • Chamber: .300BLK
  • Contour: Medium
  • Fluted: No
  • Barrel Length: 16"
  • Twist Rate: 1:8 (Polygonal)
  • Gas System: Carbine Length
  • Diameter at Gas Port: 0.750"
  • Thread Pitch: 5/8x24
  • Feed Ramps: M4
  • Material: LW-50 Stainless Steel
  • Finish: Bead Blasted
  • Process: Button Rifled
  • Barrel Lining: No
  • Barrel Extension: Improved M4
    • Nickel Boron coating
    • Extended Feed Ramps
  • Assembly: Stripped
  • Weight: 32.0oz