Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

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 FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart

300 AAC Blackout Ammo is a relatively new centerfire rifle caliber, developed in 2009 and approved by SAAMI in 2011. It's designed to fill the niche in between 5.56x45mm NATO rounds and the 9mm for use in carbines. It is available in subsonic and supersonic loads, allowing for tactical versatility when combined with suppressors. Best of all, it only requires a simple barrel change for conversion from a 5.56 NATO on an AR platform.image

Does SIG make a 300 Blackout?

Yes, in addition to their line of 300 Blackout Ammo, SIG SAUER makes several models of firearms chambered for 300 BLK. These include the SIG MCX VIRTUS Pistol, SIG MCX Rattler SBR, SIG MCX VIRTUS SBR, SIG MCX RATTLER CANEBRAKE, and SIG MCX Rattler PCB. Of course, there are many other manufacturers that make rifles, pistols, and SBRs chambered in 300 AAC Blackout, most of them are on an AR platform, but you can find them in different styles including bolt-actions.

What ammo do I need for 300 Blackout?

Even though a firearm may chamber different calibers, and 300 AAC Blackout Rifle Ammunition may chamber into other firearms, 300 BLK should only be fired through firearms with the caliber designation stamped onto the barrel. There is no interchangeable caliber like .223 Remington through a 5.56 NATO or 7.62 NATO through a 308 Winchester.

As always, do not fire any ammunition in any firearm before fully checking and understanding the firearm manufacturer's specifications.

What is the weight of the SIG Sauer 300 Blackout round?

Like many other calibers, SIG SAUER Rifle Ammo for the 300 AAC Blackout comes in a variety of bullet weights and bullet types depending on your intended application. This affects the muzzle velocity, measured in fps (feet per second), which can vary considerably depending on the load. This will also affect muzzle energy, measured in ft-lbs (foot-pounds). SIG SAUER offers OTM (Open Tip Match), FMJ (Full Metal Jacket), and hunting tips. They are typically sold in a 20-round box.

Buy SIG SAUER 300 AAC Blackout Ammo from OpticsPlanet!

Shop at OpticsPlanet for SIG SAUER 300 AAC Blackout Ammo and all of your other SIG SAUER Ammo! If you're looking to see what's ready to ship today without backorders, bookmark and regularly check our In-Stock Ammo page, we update it as soon as new inventory comes in. Learn more in the Rifle Ammo Guides our own in-house experts and enthusiasts have put together. Still have questions? Reach out and contact our Product Experts anytime!

Click here for answers to Ammo Buying Frequently Asked Questions, and for more information check out our State of the Ammunition Industry page.

7 Products in SIG SAUER 300 Blackout Ammo

reset
Sort by
Most Popular +
  • Most Popular
  • Price: Low to High
  • Price: High to Low
  • Avg. Rating: High to Low
  • Price Per Count: Low to High
  • Price Per Count: High to Low
  • Most Reviewed First
  • Savings % Off
  • Bonus Bucks %: High to Low
  • Bonus Bucks %: Low to High
  • Newest First
  • A to Z
  • Z to A
Show
60 +
  • 20
  • 60
  • 120
  • 240
reset
Show
60 +
  • 20
  • 60
  • 120
  • 240
Unfortunately, the item(s) selected is out of stock. Please update your specifications to see more results.

Deals

reset

Categories

reset

Brands

reset
Price
reset
From $
To $

    Made in USA

    reset
    • All SIG SAUER 300 Blackout Ammo  (7)
    • All Deals  (1)
    Compare (0)
    Last updated 2026-08-16 UTC.