Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Special offer available for this product. Click here to see!
Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
Questions & Answers
Thinking of changing my Modern Materiel SBF to 300 Blackout. What else is required to make the swap? Would you recommend anything else be changed? Expert Answer

Besides changing the barrel, you would also need to address the buffer system and ensure you have the correct weight and spring for your specific build. A go-no go gauge is also recommended when swapping barrels. I would suggest emailing us at Techsales@opticsplanet.com for more information.

by Ethan, Gear Expert, April 12, 2022
Do I need a head spaced bolt or is that just an added feature to improve the rifle ? Expert Answer

You do not require a head spaced bolt specific to this barrel. Most people would just recommend that you check the head spacing of your bolt with your barrel, but most quality manufacturers will have bolts/barrels that are within spec.

by Armando R., Gear Expert, February 12, 2020
Customer Reviews
Helpful Negative Review
Gas Block issue by marcb, Verified Owner, December 1, 2021
Quite sure Noveske makes great barrels with longevity and quality but the issue with gas block has been going on for quite sometime now with no remedy. Gas block issues are prevalent among reviewers. Other said take your time, put it on leather, pape...
Read More...
25/32 found this helpful
Read 1 Review
Show In Stock Only
4 Models Available
Barrel Length
All
Barrel Profile
All
Weight
All
Included Accessories
All
Search

Product Info for Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel

Noveske's 300 AAC BLACKOUT is designed to run optimally firing both subsonic suppressed and supersonic unsuppressed. This barrel is tuned to lock back on the last round using subsonic 220 and 208 grain ammunition with a sound suppressor. The firearm may not lock back with subsonic 220 and 208 grain ammunition without a sound suppressor. Also, the subsonic 300 BLK ammunition is more susceptible to a malfunction due to carbon fouling and adverse conditions than supersonic ammunition. The barrel is tuned to operate correctly with the back pressure provided by the AAC 762-SDN-6 using an H2 buffer, or a Surefire 762K suppressor and an H buffer. In the development of this barrel, we found evidence that the suppressor may require a symmetrical baffle stack as found in the AAC Cyclone K, 762-SDN6, and Surefire 762K suppressor. Suppressors which cause off axis turbulence, such as those with K type baffles, may cause baffle strikes and/or point of impact shift, and may damage your suppressor. Noveske Rifleworks LLC will not be responsible for damage or injury under ANY circumstances. Consult you suppressor manufacturer to determine if your suppressor is suitable for this application.image

Specifications for Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel:

Manufacturer: Noveske
Color: Silver
Fabric/Material: Stainless Steel
Caliber: .300 AAC Blackout
Gas System Length: Pistol Length
Threads per Inch: 5/8x24
Barrel Twist Rate: 1-7
Additional Features: Medium Contour, .750 Gas Block
Condition: New

Package Contents:

  • Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel

Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel Orderable Models

List of Orderable Models

  • Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel, 10.5in Shorty, Pistol Length, Stainless, .750 Gas Block, Headspaced Bolt, 07000021 , MPN: 7000021 , UPC: 840906104224 , Code: NVK-ATB-LPGB300-07000021
  • Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel , MPN: 07000034 , UPC: 840906104453 , Code: NVK-ATB-LPGB300-07000034
  • Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel, 12.5in Leonidas, Pistol Length, Stainless, .750 Gas Block, 07000038 , MPN: 7000038 , UPC: 840906104477 , Code: NVK-ATB-LPGB300-07000038
  • Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel, 12.5in Leonidas, Pistol Length, Stainless, .750 Gas Block, Headspaced Bolt, 07000195 , MPN: 7000195 , UPC: 840906111390 , Code: NVK-ATB-LPGB300-07000195

Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel, 8.5in Navy, Pistol Length, Stainless, .750 Gas Block, 07000031 , MPN: 07000031-DEMO , Code: NVK-ATB-LPGB300-07000031-DEMO
  • Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel, 8.5in Navy, Pistol Length, Stainless, .750 Gas Block, 07000031 , MPN: 07000031 , UPC: 840906104439 , Code: NVK-ATB-LPGB300-07000031
  • DEMO, Noveske .300 AAC Blackout 10.5 Inch Stainless Steel Barrel with Pinned Gas Block and Gas Tube - All NFA Rules Apply, 07000034 , MPN: 07000034-DEMO , Code: NVK-ATB-LPGB300-07000034-DEMO
  • Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel, 8.5in Navy, Pistol Length, Stainless, .750 Gas Block, Headspaced Bolt, 07000020 , MPN: 7000020 , UPC: 840906104217 , Code: NVK-ATB-LPGB300-07000020
  • DEMO, Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel, 10.5in Shorty, Pistol Length, Stainless, .750 Gas Block, Headspaced Bolt, 07000021 , MPN: 7000021-DEMO , Code: NVK-ATB-LPGB300-07000021-DEMO
  • Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel, 14.5in Afghan, Pistol Length, Stainless, .750 Gas Block, 07000039 , MPN: 7000039 , UPC: 840906104484 , Code: NVK-ATB-LPGB300-07000039
  • Noveske .300 AAC Blackout Stainless 16 Inch Barrel with Pinned Gas Block And Gas Tube, 07000040 , MPN: 07000040 , UPC: 840906104491 , Code: NVK-ATB-LPGB300-07000040
  • Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel, 14.5in Afghan, Pistol Length, Stainless, .750 Gas Block, Headspaced Bolt, 07000015 , MPN: 7000015 , UPC: 840906104200 , Code: NVK-ATB-LPGB300-07000015
  • Noveske Lo-Pro Gas Block 300 AAC Blackout Barrel, 16in Recon, Pistol Length, Stainless, .750 Gas Block, Headspaced Bolt, 07000029 , MPN: 7000029 , UPC: 840906110553 , Code: NVK-ATB-LPGB300-07000029
Compare (0)