MPN: 300M7T 5.5 / 300M7T 6.5 / 300M7T 8.25 / 300M7T 10.25


  • Features a true improved .30 cal barrel extension and extended feed ramps
  • Comes with a pin-ready V7 Grade 5 Titanium Proprietary Gas Block and a V7 Proprietary Inconel Straight Gas Tube
  • Ported for supersonic ammo
  • Made in the U.S.A.

*A barrel that is shorter than 16" is only for use on a pistol configuration firearm or a NFA registered Short-Barreled Rifle (SBR). All NFA laws apply!


  • Caliber: .300 Blackout
  • Profile: Medium
  • Finish: Non-Glare Bead Blasted
  • Gas Placement: Pistol-Length
  • Gas Seat: 0.750"
  • Twist Rate: 1:7 Poly Rifling
  • Weight (With Gas Block):
    • 5.5-Inch: 13.37 oz.
    • 6.5-Inch: 14.32 oz.
    • 8.25-Inch: 17.57 oz.
    • 10.25-Inch: 20.74 oz.
  • Material: 416R Stainless Steel
  • M4 Feed Ramps: Yes
  • Muzzle Thread Pattern: 5/8"-24


  • AR-15 upper receiver

*Ported for supersonic ammo only

*Proprietary gas tube does not fit Aero Precision Enhanced Upper (M4E1 & M5E1), Mega Arms Billet Uppers, or Seekins Precision SAR Handguards

*Carbon filter or round handguards that do not have the gas block notch may not clear the tall proprietary V Seven gas block on this barrel


  • 1x V Seven 300 Blackout Barrel
  • 1x V7 Grade 5 Titanium Proprietary Gas Block
  • 1x V7 Proprietary Inconel Straight Gas Tube (6.25")
  • 1x Gas Tube Roll Pin
  • 1x Gas Block Set Screw
  • 1x Gas Block Pin


The V Seven 300 Blackout barrel will give you the stopping power of a .30 caliber round while allowing you to keep the AR-15 platform that you know and love. V Seven delivers one of the best 300 Blackout barrels on the market that is ported for supersonic ammo and comes complete with everything you need for your next AR-15 .30 caliber build.

Why Upgrade to 300 Blackout?

Whether you want an effective home defense weapon or a powerful hunting rifle, the V Seven 300 Blackout barrel takes your AR-15 to another level. The standard 5.56 NATO round may not provide the knockdown power required when the time comes. Upgrading to the 300 blackout will give you all the power you need while still using the same magazine and bolt of your traditional AR-15 rifle. The 300 blackout ammunition demonstrates the best of both worlds by combining a heavy .30 caliber round with the effectiveness and versatility of the AR-15 platform.

V Seven 300 Blackout Versatility

V Seven offers four different 300 blackout barrel lengths between 5.5” to 10.25”, making it perfect whether you are building a short rig for close-quarter engagements, or a hunting rifle for mid and long-range shots. V Seven is the perfect option for your 300 blackout build because they include everything you need, such as the gas block and gas tube, to correctly upgrade your AR-15 into a rifle with outstanding stopping power. Choose the V Seven 300 Blackout barrel and bring your standard AR to a whole new level.


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