300 Blackout for Sale | Rifles, Ammo, & Parts
Shop 300 Blackout rifles, ammo, uppers, and parts on GunBroker. Find new and used 300 BLK listings from trusted sellers, including subsonic and supersonic options for hunting, range use, and suppressed shooting. Compare categories below to find the right setup.
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300 blackout
Explore 300 Blackout rifles, ammo, uppers, and parts available on GunBroker. Browse new and used listings from trusted sellers and compare categories to find the right setup for your needs.
About the 300 Blackout Cartridge
The 300 AAC Blackout, often shortened to 300 Blackout or 300 BLK, was designed to deliver reliable performance in AR-15 platforms without changing the bolt or magazine. This versatile cartridge supports both subsonic and supersonic loads, making it a popular choice for suppressed shooting, hunting, and general use.
Developed from a .223/5.56 case necked up to .30 caliber, 300 Blackout performs efficiently in short barrels while producing less muzzle flash and recoil than comparable calibers. It is widely used in compact rifle and pistol configurations where consistent cycling and flexibility are important.
Why Shooters Choose 300 Blackout
The flexibility of 300 Blackout makes it one of the most adaptable AR-15 calibers available. It is designed to perform reliably with both subsonic and supersonic ammunition, allowing seamless transitions between load types without changing core components. Compared to 5.56 NATO, 300 Blackout offers better performance in short barrels and suppressed setups.
Paired with a 300 Blackout suppressor, subsonic loads deliver reduced noise and recoil, while supersonic rounds provide increased velocity and energy. This balance makes 300 BLK a versatile option across a wide range of shooting applications.
How to choose the right 300 Blackout setup:
- Barrel length: 8-10" for compact builds, 12-16" for standard rifle configurations.
- Gas system: pistol-length gas for shorter barrels, carbine or rifle-length for longer configurations.
- Ammunition: 110-125 grain for supersonic loads and higher velocity; 185-220 grain for subsonic performance.
300 Blackout Rifles, Ammo, & Components
GunBroker offers a wide selection of 300 Blackout rifles, pistols, and 300 Blackout ARs. Buyers can also find bolt-action firearms for hunting or precision shooting.
For builders, there are dedicated options for 300 Blackout uppers, barrels, and magazines, allowing you to customize your setup for specific performance goals.
Browse 300 Blackout ammo, including subsonic 300 Blackout ammo designed for suppressed shooting.
300 Blackout Frequently Asked Questions
- What is 300 Blackout used for?
- 300 Blackout is widely used for hunting, home defense, and suppressed shooting. It performs well in short barrels and offers reliable feeding in AR-15 platforms.
- Is 300 Blackout good for hunting?
- Yes. 300 Blackout is effective for medium game such as deer and hogs, especially within 200 yards when using appropriate ammunition.
- What’s the difference between subsonic and supersonic 300 Blackout ammo?
- Subsonic ammo travels below the speed of sound and is ideal for suppressed use, while supersonic ammo provides higher velocity and energy for general shooting and hunting.
- Do I need special magazines for 300 Blackout?
- No. 300 Blackout works with standard AR-15 magazines, though many shooters prefer marked, dedicated magazines to avoid mixing calibers.
Buy 300 Blackout Rifles, Ammo, & Parts on GunBroker
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This content is for informational purposes only and does not constitute legal advice. Always consult your local laws and regulations before purchasing firearms, ammunition, or firearm parts.